Comment on the accentual structure of the following word: overvalue

A pronunciation dictionary such the Longman Pronunciation dictionary will give you the most up to date pronunciation for British English (RP) and the pronunciation for Gen AM so as to allow you to compare. However, in order to specialize in American pronunciation I advise that you use some other dictionary, that is one that treats specifically the subject of American pronunciation; not having studied the subject myself, I can't recommend any.

This is LPD's symbols (essentially IPA, with rare changes and additions)

ˌəʊv ɘ 'væl ju: (RP)

oʊv r 'væl ju: (General American)

• This is an ˌoverˌvalued 'estimate.

• They ˌoverˌvalued that 'limit.