Where does “ổ mềm” come from?

ổ mềm (Vietnamese) comes from Vietnamese ổ, from Proto-Vietic ʔuh.

Ancestry of “ổ mềm”, step by step

ổ mềm traces back through two separate lines of ancestry.

via Vietnamese

StepLanguageWordMeaning
1Vietnamesea nest; a space where a lot of beings of the same...
2Proto-Vieticʔuh

via Vietnamese mềm

StepLanguageWordMeaning
1Vietnamesemềmsoft
Every word from Proto-Vietic ʔuhEvery word from Vietnamese