picklock

pick +‎ lock

picklock (plural picklocks)

1. A device designed to pick locks.
   • c. 1603–1604 (date written), William Shakespeare, “Measure for Measure”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act III, (please specify the scene number in lowercase Roman numerals)]:

     Marry, sir, he hath offended the law; and, sir, we take him to be a thief too, sir, for we have found upon him, sir, a strange picklock, which we have sent to the deputy.

2. One who picks locks; a thief.
   • 1664-1667, Jeremy Taylor, Dissuasive from Popery

     a picklock of secrets

• lock pick
• pick

• lock pick, lock-pick, lockpick