IPA: /ˈoʊvərˌsɔft/
KK: /ˈoʊvərsɔft/
Describing something that is excessively soft or gentle, often to the point of being ineffective or lacking firmness.
The oversoft pillow did not provide enough support for my neck while I slept.
Oversoft → It is formed from "over-" (meaning excessively) and "soft" (from Old English "softe", meaning gentle or yielding). The word "oversoft" means excessively soft or yielding beyond what is normal or desirable.
Think of something that is 'excessively' ('over-') 'gentle' or 'yielding' ('soft') — that's why oversoft means too soft.
No commonly confused words.