合致
がっち · gacchi · JLPT N1 · noun
agreement
🧩 合 = fit together + 致 = arrive at; parts that fit and arrive at one point = agreement
合 means join or fit, and 致 means reach or bring about. Two parts that fit together and reach the same point give agreement or conformity. Say 'gatchi' like the click of two pieces locking together.
合 — 乛 (lid/roof) + 口 (mouth)
Originally a pictograph of a lidded vessel — a cover (亼) closing over an opening (口) — giving the core sense of 'come together, join, fit.' From 'fit/match' it extended to 'combine, unite, agree' and to measure-word uses. The reading hé reflects this 'joining' meaning.
致 — arrive 至 + strike/go 攵
Originally a compound of 至 (to arrive, showing an arrow reaching the ground) and 攵 (a hand with a stick, indicating action). Together they suggested 'to cause to arrive' or 'to send/deliver,' which broadened into modern senses like 'to send, devote, or bring about.'