Where does “ổ cứng” come from?

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

Ancestry of “ổ cứng”, step by step

ổ cứng traces back through two separate lines of ancestry.

via Vietnamese ổ

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

via Vietnamese cùng

StepLanguageWordMeaning
1Vietnamesecùngthe end, limit; with; and
2Middle Chinese宮—
Every word from Proto-Vietic ʔuh →Every word from Vietnamese ổ →