in what manner, how · what about... (used to make a suggestion)
eş: いかに, いかが, いかん
köken: First cited to 1604 in the Portuguese work Arte da Lingoa de Iapam. The initial ど (do) may be cognate with the interrogative ど (do) seen in どれ (dore), どこ (doko), どち (dochi). Alternatively, possibly from older form だう (dau), much like the shift from かう (kau) → こう (kō, “like this, this way”), or さう (sau) → そう (sō, “like that, that way”). This shift is apparently suggested in the Arte da Lingoa de…
köken: From Proto-Malayo-Polynesian *huy (“exclamation to express surprise, call to a friend, respond to a distant call, etc.”). Compare Cantonese 喂 (wai²) or Min Nan 喂 (oeh).