Once

"Once" in cmn

一次

yī cì

(one and only one time)

一遍

yī biàn

(one and only one time)

以前

yǐqián

(formerly)

曾經 /曾经

céngjīng

(formerly)

有一次

yǒu yī cì

(formerly)

一旦

yīdàn

(as soon as)

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.