I am not aware of a suffix per se with that meaning, but I sometimes see the idea expressed by forming a pairing with the word agnostic. Although the first meaning of this word is specifically about religious belief, it can also be used in a more general sense:

2. a person who is unwilling to commit to an opinion about something

(Merriam-Webster)

Though M-W does not document it, other sources indicate that the word can also be used as an adjective to describe a person who holds the (non-)beliefs of an agnostic on a particular subject.

Thus, you might say "Chrome and Internet Explorer both have strong partisans, but I am browser-agnostic."

It seems you are looking for a concise, easily understandable term for someone who is neither a -phile nor a -phobe. I would suggest the suffix -neutral. It may be more of an adjective than a noun, but it can be pressed into service as a noun by ellipsis. Thus:

Which of the following describes you best?

I am a technophile

I am a technophobe

I am techno-neutral

90% of the technophiles, 50% of the techno-neutrals* and 10% of the technophobes said they had heard of the product.

(* where techno-neutrals is an ellipsis for techno-neutral respondents to the survey.)

"Don't care" means one has no heart for something, it is not usually synonymous with "unfamiliar" or "innocent". It connotes veiled disdain for a given topic, making -nostic & -neutral & -middle (Gr. -meso) too gentle, and -phobic insincere.

The prefix "anti-" seems more correct than any available suffix. The most appropriate term in Greek: "ekhthros", (personal enemy), is unsuitable for an English suffix. ("Techno-ekthros?")

There's also '-clast' (Gr. -klastes, a breaker or wrecker), the sole English word being iconoclast, used to describe certain Christian zealots that vandalized or defaced sculpture and art which they believed promoted idolatry and false gods; later iconoclast mellows and signifies nonconformists and radicals who break with tradition, yet need not break physical objects.

I propose '-meh'

• Arachnophobe

• Arachnophile

• Arachnomeh

In the right tone of voice, I think that could work.

Meh, Wikipedia

Meh is an interjection used as an expression of indifference or boredom. It may also mean "be it as it may". It is often regarded as a verbal shrug of the shoulders

If an english suffix would fit, I would suggest -indifferent as in:

• techno-indifferent,
• arachno-indifferent,
• agora-indifferent,
• homo-indifferent…

I'd also propose -apathetic

Apathetic (adj): Showing or feeling no interest, enthusiasm, or concern

Apathy derives from French apathie, via Latin from Greek apatheia, from apathēs without feeling, from a- without + pathos suffering.

Example usage:

• Ailurophilic Loves Cats
• Ailuroapathetic Is unconcerned about or indifferent to cats

Not the best choice suggested here, but one might use -**ambivalent**:

▸adjective: feeling two different things about someone or something at the same time, for example that you like them and dislike them

▸ adjective: uncertain or unable to decide about what course to follow ("Was ambivalent about having children")

▸ adjective: characterized by a mixture of opposite feelings or attitudes ("She felt ambivalent about his proposal")

Example usage:

• "I'm cinephilic, Sinophobic, and cyno-ambivalent"

-apathic

A slightly lighter-weight version of @EricKigathi's -apathetic.

-pathic, suffix meaning affected by —The Free Dictionary (citing Mosby's Medical Dictionary, 2009(

apathic, without sensation or feeling. —The Free Dictionary (citing Saunders Comprehensive Veterinary Dictionary, 2007)

apathic, synonym of apathetic —Wiktionary

Despite the frequent concurrence of don't know and don't care, they mean different things. @PellMel's browser-agnostic is a good term for code that doesn't know what browser it's running on (and doesn't need to know, because it's compatible with all of them). But the OP question contrasts -phobe and -phile so this is about feeling. Browser-apathic code was written by someone who didn't care which browser they were trying it on (so it may only work on one of them).

Technology:

• techno-phobic - hates technology, averse to using it
• techno-philic - loves technology, early adopter of gadgets
• techno-agnostic - ignorant of technology, doesn't know how to use it
• techno-apathic - apathetic about technology, as likely to choose a nontechnical solution

Spiders:

• arachno-philic - fascinated by spiders
• arachno-phobic - afraid of spiders
• arachno-agnostic - ignorant about spiders, but might want to learn
• arachno-apathic - apathetic about spiders, neither jumps at them nor checks which species

@MaxWilliams' -mesic may be useful if you wanted a term that was ambiguous about knowing or caring. Is there a case where that's better than being specific? Haven't thought of one yet.

I'm doubtful there exists one clear middle ground between love and hate. @SAH's -ambivalent is a third. Maybe there are others, and they shouldn't be muddled.

@user1892306's -meh is exquisitely precise in meaning but it doesn't look like a suffix; turning it into one loses recognition even from those familiar with this neologism.

The suffix "-path" (as in apathy) may have this meaning, but I can't think of any other examples right now besides "sociopath" (one who doesn't care about society), and possibly also "psychopath". Clearly, the suffix can also have other meanings, as in "homoeopath" and "naturopath", but in some cases, I think it may have the meaning you're looking for.

It is not worth it using a short suffix that is semantically only close to what you are trying to express, for a concept used that rarely.

You could invent a new suffix that describes by definition exactly what you want to say, otherwise the usage of extra syllables should be preferred over losing part of the meaning.

Indifference is oftentimes used as the default condition, a placeholder, and it isn't univocal, as opposed to like and dislike.

When you are indifferent it can mean that you haven't thought of the matter before, and thus you haven't made up your mind yet [Case 1]. Or it can mean that you have thought of it and you really are indifferent [Case 2].

This ambiguity increases the complexity of inventing such a suffix.

To illustrate the above, let's suppose that there exist arachnids, and people can either be averse or fond of them. What a person feels towards arachnids can be thought of as a variable that can have one of the following values: 'like', 'dislike', 'indifferent', which describe fondness, aversion or indifference towards arachnids. The value indifference is the indifference we described in Case 2. The variable however can also have no value (this is exactly how 0 works in numbers -it's a placeholder). This "no value" is the indifference described in Case 1.

In programming we do:

if the value of arachnid_variable is 'like'
    Then the_person likes arachnids
else if the value of arachnid_variable is 'dislike'
    Then the_person dislikes arachnids
else if the value of arachnid_variable is 'indifferent'
    Then the_person gives 0 fucks about arachnids
else
    the_person is indifferent towards arachnids because he is not even aware of their existence, or because he has never thought to form an opinion about them

A suffix like -phile or -phobe for indifference would have purpose only in Case 2, when you want to make the statement that you have considered the 'like' and 'dislike' options, and you have opted for indifference. In contexts where indifference is the default condition (i.e. the "no value" we described above), it should not be stated, and thus such a suffix would be unusable.

As it's very well stated in the accepted answer (by Max Williams), adiaphoria (= indifference) is indeed the concept between -phile and -phobe (even though it is said that the opposite of love is indifference and not hate ^^).

In Greek, adiaphoria eventually boils down to "the act of making no distinction/ differentiation" (probably pretty close to 'indifference'). So, if you want to invent a new suffix derived from greek "-mesis" and "-oudeteros" (concepts of in the middle and neutral) are not correct. "-adiaphoric" could work ("adiaphoro" with the Greek suffix), but I would prefer the English suffix -indifferent, as proposed by daniel Azuelos, which is simple and precise.