遄

Core sense is haste or urgency in motion, typically implying purposeful, directional speed. This manifests as either urgent transit (swift departure or rushing toward a specific goal) or the completion of a round trip (a swift return).

Functions as a verb (to hasten; to rush) or an adverb (quickly; swiftly).

Contrast with 湍 (tuān): while both share imagery of rushing motion, 湍 is used for physical turbulence in water (rapids), whereas 遄 describes intentional human movement.

The reading is stable, as confirmed by the fanqie 市緣.