昨 zuó — yesterday; last night; past; bygone 昨 zuó Level 1 · Common HSK 1 #1489 zuó zuo2 Basic definition noun yesterday; last night; past; bygone e.g 昨天昨日 adverb yesterday; formerly; in the past e.g 昨非今是昨非 Detailed explanation noun (形声。从日,乍声。本义:隔夜,上一天) noun yesterday e.g 昨夜 昨伲 · 昨而子 · 昨日子 · 昨几 · 昨宵 · 昨暝 noun past e.g 昨非 昨年 · 昨先 · 昨前 · 昨轨 · 昨者 Related words 昨天 zuó tiān yesterday 昨晚 zuó wǎn yesterday evening; last night 昨日 zuó rì yesterday 昨夜 zuó yè last night 昨非 zuó fēi yesterday's error; the mistakes of the past 今是昨非 jīn shì zuó fēi right today, wrong yesterday; realizing one's past errors