当
dāng · HSK 2
when
⏰ 当 dāng sounds like 'dong' of a bell — the moment when it rings
当 means 'when/while' — the timing word. Sound hook: dāng echoes the 'dong' a bell makes, marking the exact moment something happens. Also appears in 当时 (at that time) and 当然 (of course).
当 — small ⺌ + crown 冖 + hand 彐 (simplified from 當: 尚 + 田)
Originally written 當, combining 田 'field' with 尚 as a phonetic. The early sense was 'to match' or 'face' a field of equal value, extended to 'correspond to', 'ought to', and 'serve as'. The simplified form 当 streamlines the upper 尚 component.