Where does “đang không” come from?

đang không (Vietnamese) comes from Vietnamese không, from Chinese 空, from Proto-Sino-Tibetan (g/k)uŋ — hole; orifice; hole; orifice; inner part.

đang không (Vietnamese): out of the blue

Definitions

  1. out of the blue

Ancestry of “đang không”, step by step

đang không traces back through two separate lines of ancestry.

via Vietnamese không

StepLanguageWordMeaning
1Vietnamesekhôngnot; idly, without doing anything; not have; to...
2Chinese空empty, hollow
3Proto-Sino-Tibetan(g/k)uŋhole; orifice; hole; orifice; inner part

via Vietnamese đáng

StepLanguageWordMeaning
1Vietnameseđángworthy, worth; to deserve, to merit
2Proto-Vietictaŋʔbitter
3Proto-Mon-Khmerkt₂aŋbitter
Every word from Proto-Sino-Tibetan (g/k)uŋ →Every word from Chinese 空 →Every word from Vietnamese không →