godan verb (-tsu), intransitive verb
Used for starting a journey or trip; often implies a purposeful departure. The kanji 発 specifically indicates 'departure' and distinguishes this from other たつ verbs like 立つ (stand) or 建つ (be built).
See also: 立つ
明日、東京を発つ予定です。
I plan to leave Tokyo tomorrow.
彼は早朝に家を発った。
He set off from home early in the morning.