lock-in

  1. Noun yükümlülük, taahhüt, bağlılık, mecburiyet, zorunluluk, sınırlılık.
kapa(t)mak, sıkışıp/kapanıp kalmak.
The ship was locked in ice. The secret was locked in her heart.

to lock oneself in: kapanmak, kapalı kalmak.