待ち合わせ
まちあわせ · machiawase · JLPT N1 · noun
appointment
待 — chì 彳 (step) + 寺 sì (temple/phonetic)
待 combines the 'step' radical 彳, suggesting movement or a path, with 寺, which serves as the phonetic component. Originally it conveyed the idea of stopping along a road, which extended to 'waiting.' Over time it also took on related meanings like 'to treat' or 'to deal with' someone.
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.