nguyên nhân

== Vietnamese == === Etymology === Sino-Vietnamese word from 原因, composed of 原 (“origin; foundation”) and 因 (“cause; reason”). === Pronunciation === (Hà Nội) IPA(key): [ŋwiən˧˧ ɲən˧˧] (Huế) IPA(key): [ŋwiəŋ˧˧ ɲəŋ˧˧] (Saigon) IPA(key): [ŋwiəŋ˧˧ ɲəŋ˧˧] === Noun === nguyên nhân cause, reason