进去
jìnqù · HSK 1
go in
🚪➡️ 进去 = enter (进) + go (去) — 'go inward'
进 means enter/advance; 去 means go (away from speaker). Together: go in, from the outside heading inward. Contrast with 进来 (come in, toward speaker).
进 — walk radical 辶 + well 井
Originally a semantic-phonetic compound: the walking radical 辶 gives the meaning of movement, while 井 (jǐng, 'well') supplied the sound. The traditional form 進 used 隹 (short-tailed bird) suggesting forward flight; the simplified 进 swapped 隹 for the simpler phonetic 井. The core meaning 'to advance, enter' has stayed stable.
去 — 土 earth on top + 厶 (originally 凵, a vessel/container) below
Originally a pictograph showing a person (大) departing from an enclosed area or vessel, suggesting leaving or going away. Over time the top simplified to 土 and the bottom to 厶. The core meaning 'to go, to leave, to depart' has remained stable since ancient Chinese.