lock

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lock2
A. contrivance for fastening a door, etc. OE.; mechanism of discharge in fire-arms XVI;

B. barrier on a river XIII;

C. (? f. the vb.) interlocking grip XVI. OE. loc = OS. lok, OHG. loh (G. loch) hole, ON. lok lid, end, conclusion (Goth. has usluk opening) :- Gmc. *lokam. *lukam, f. *luk- *lūk- close, enclose, whence str. vb. *lūkan, OE. lūcan, which was repl. (XIII) by lock vb., a new deriv. of the native sb. or an adoption of ON. loka.
Hence locker XV.

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