Antonyms of verb unlock

2 of 3 senses of unlock

Sense 1
unlock -- (open the lock of; "unlock the door")
       Antonym of lock (Sense 1)
      => lock -- (fasten with a lock; "lock the bike to the fence")

Sense 3
unlock -- (become unlocked; "The door unlocked from the inside")
       Antonym of lock (Sense 1)
      => lock -- (fasten with a lock; "lock the bike to the fence")
       Antonym of lock (Sense 3)
      => lock -- (become rigid or immoveable; "The therapist noticed that the patient's knees tended to lock in this exercise")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb unlock

3 senses of unlock

Sense 1
unlock -- (open the lock of; "unlock the door")
       => open, open up -- (cause to open or to become open; "Mary opened the car door")

Sense 2
unlock -- (set free or release)
       => disengage, withdraw -- (release from something that holds fast, connects, or entangles; "I want to disengage myself from his influence"; "disengage the gears")

Sense 3
unlock -- (become unlocked; "The door unlocked from the inside")
       => disengage -- (become free; "in neutral, the gears disengage")

Antonyms of adj unlocked

1 sense of unlocked

Sense 1
unbarred, unbolted, unlatched, unlocked, unsecured -- (not firmly fastened or secured; "an unbarred door"; "went through the unlatched gate into the street"; "an unlocked room")

INDIRECT (VIA unfastened) -> fastened -- (firmly closed or secured; "found the gate fastened"; "a fastened seatbelt")

Similarity of adj unlocked

1 sense of unlocked

Sense 1
unbarred, unbolted, unlatched, unlocked, unsecured -- (not firmly fastened or secured; "an unbarred door"; "went through the unlatched gate into the street"; "an unlocked room")
       => unfastened (vs. fastened) -- (not closed or secured; "the car door was unfastened"; "unfastened seatbelts")