Picklock

Part of speech: noun, verb

Definitions

1. A small instrument used to open locks without a key by manipulating internal mechanisms ; a person who illegally opens locks to gain unauthorized access
2. A specialized tool designed for opening locked devices without the original key ; an individual skilled in opening locks unlawfully
3. An item employed to unlock locks stealthily without using keys ; someone who performs unauthorized lock openings, often for theft

Etymology: "Picklock" is a compound of "pick," in its sense of a tool for prying or probing, and "lock." The pick part comes from an older verb meaning to pierce or peck, so the word literally describes a tool used to pick at a lock's innards rather than turn a matching key. The same "pick" appears in toothpick and ice pick, and it is the sense that gives us the verb "to pick a lock." The compound works the same way in both of its senses. As an instrument, it names the thin metal probes a locksmith or intruder slides into a keyhole to lift the pins or wards inside. As a person, it names the one who uses those tools, usually for unauthorized entry. Because the word is formed transparently from two plain English elements, its meaning has stayed close to its parts for centuries, with little drift from the original picture of prying at a lock.

Synonyms: burglar, thief, crook, sneak, knave

Antonyms: law-abiding citizen, protector, guardian, defender, hero