combination lock
Numbered dial security
A combination lock opens not with a key but by entering a sequence of numbers or symbols.
Most require rotating a dial through a series of positions: I forgot my locker combination.
Digital versions use keypads or touchscreens.
The combination is both the lock type and the specific sequence that opens it.
Graduated circular indicator
- tumblerFlat-bottomed drinking vessel
- codeSymbolic communication system
- shackleMetal limb restraint
- cylinderCircular-based solid form
permutation · hasp · latch · bolt · spinning · numbers · sequence · reset
Challenging mental puzzle
- crackingBreaking without separating completely
- safecrackerOne who breaks vaults
- mysterySomething unexplained or unknown
- challengeTest of ability
decoding · sequence · logic · patience · spy · heist · escape room · codebreaking
Free from peril
- vaultSecure storage chamber
- luggageTraveler's packed containers
- toolboxContainer for implements
- gateHinged barrier in fence
shed · storage · chain · steel · hardened · tamper-proof · burglarproof · safeguard
Access or submission
- restrictedLimited in scope
- authorizationFormal permission granted
- checkpointInspection station on route
- barrierObstruction preventing passage
gatekeeper · access code · keyless · memorization · cracking · bypass · unauthorized · trial-and-error
dial
Graduated circular indicator
cylinder · permutation · hasp · latch · bolt · spinning · numbers · sequence · reset · rotary
brain-teaser
Challenging mental puzzle
- crackingBreaking without separating completely
- safecrackerOne who breaks vaults
- mysterySomething unexplained or unknown
challenge · decoding · sequence · logic · patience · spy · heist · escape room · codebreaking · problem-solving
safe
Free from peril
gate · shed · storage · chain · steel · hardened · tamper-proof · burglarproof · safeguard · protection
entry
Access or submission
- restrictedLimited in scope
- authorizationFormal permission granted
- checkpointInspection station on route
barrier · gatekeeper · access code · keyless · memorization · cracking · bypass · unauthorized · trial-and-error · guessing
- door securitydeadbolt, key card, key fob, fingerprint scanner, PIN pad
- lockpickinglockpick, picks, pick, rake, tension wrench
- locksdeadbolt, keys, padlocks, deadbolts, bolt locks
- securitysecurity guard, security cameras, alarm system, security system, safe
- bank vaultvault door, safe deposit box, safe-deposit box, safety deposit box, strongroom
- hardwaredoor handle, hinge, latch, screw, bolt
combination lockkey lock
Mechanism requiring shaped metal
cylinder lock · tumbler lock · deadbolt · biometric lock · electronic lock
combination lockhigh-security lock
Reinforced entry mechanism
time lock · latch · hook and eye · twist tie
lock, combine, locked, unlock, combined, locker, combination, locket, padlock