Vietnamese Etymology From trong (“in”) + khi (“when”). Pronunciation (Hà Nội) IPA(key): [t͡ɕawŋ͡m˧˧ xi˧˧] (Huế) IPA(key): [ʈawŋ͡m˧˧ kʰɪj˧˧] ~ [ʈɔŋ˧˧ xɪj˧˧] (Saigon) IPA(key): [ʈawŋ͡m˧˧ kʰɪj˧˧] ~ [ʈawŋ͡m˧˧ xɪj˧˧] Audio (Saigon):(file) Conjunction trong khi whileWikiwand - on Seamless Wikipedia browsing. On steroids.