划时代
huà shí dài · HSK 7
epoch-marking
📅 划 mark a line + 时代 era = drawing a line that splits one era from the next
Breaks into 划 (to mark or draw a line) plus 时代 (era, from 时 time + 代 generation). Something 划时代 cuts history into a before and after, hence epoch-marking.
划 — knife radical 刂 + 戈 (dagger-axe)
Originally written 劃, a semantic-phonetic compound: 刂 (knife) gives the meaning of cutting or marking, while 畫 supplied the sound and the sense of drawing lines. The simplified form 划 reuses an older character meaning to row a boat. Today it covers both senses: huá (to row, to scratch) and huà (to mark off, to plan).
时 — sun 日 + temple/measure 寺
Originally a phono-semantic compound: 日 (sun) gives the meaning of time or season, while 寺 (shí) supplies the sound. Early forms used 之 as the phonetic before 寺 replaced it. The core sense 'season, time, hour' has stayed stable since ancient Chinese.
代 — person radical 亻 + 弋 (stake/dart, phonetic)
代 is a semantic-phonetic compound: 亻 (person) gives the meaning and 弋 supplies the sound. The original sense was one person taking the place of another, which broadened to 'substitute,' 'replace,' and then 'generation' or 'era' — successive groups of people replacing the previous.