lock in

(verb) close with or as if with a tight seal. Synonyms: lock in, seal in. Example: "This vacuum pack locks in the flavor!."

(verb) place in a place where something cannot be removed or someone cannot escape. Synonyms: lock in, lock away, lock, put away, shut up, shut away, lock up. Examples: "The parents locked her daughter up for the weekend." "She locked her jewels in the safe."