Verb

ab|schließen

Translation

to lock, to complete, to finish, to conclude

Bitte schließ die Tür ab.

Please lock the door.

Er hat sein Studium abgeschlossen.

He has completed his studies.

Wir haben einen Vertrag abgeschlossen.

We have concluded a contract.

((sth.)) to lock sth. Please lock the door.

((sth.)) to complete sth. He has completed his studies.

((sth.)) ((with sb.)) to conclude sth. with sb. We are concluding a contract with the company.

beenden (to end), zumachen (to close), sperren (to lock)

Prefix 'ab-' (off, completion) + 'schließen' (to close). Literally 'to close off'.

Imagine closing ('schließen') a door and walking away ('ab-'), thus completing the action of locking it.