godan verb (-mu)
entrap; trap inside; seal in
Used for trapping someone or something inside a space, often with a nuance of sealing or confining. Can be physical or metaphorical.
敵を城に封じ込む作戦を立てた。
They devised a plan to trap the enemy inside the castle.
彼は感情を心の
He sealed his emotions deep inside his heart.