caulk

or calk

[ kawk ]
/ kɔk /

verb (used with object)

to fill or close seams or crevices of (a tank, window, etc.) in order to make watertight, airtight, etc.
to make (a vessel) watertight by filling the seams between the planks with oakum or other material driven snug.
to fill or close (a seam, joint, etc.), as in a boat.
to drive the edges of (plating) together to prevent leakage.

noun

Also caulk·ing [kaw-king] /ˈkɔ kɪŋ/. a material or substance used for caulking.

Origin of caulk

1350–1400; < Latin calcāre to trample, tread on (verbal derivative of calx heel), conflated with Middle English cauken < Old French cauquer to trample < Latin, as above

Can be confused

calk caulk
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for caulk

British Dictionary definitions for caulk

caulk

calk

/ (kɔːk) /

verb

to stop up (cracks, crevices, etc) with a filler
nautical to pack (the seams) between the planks of the bottom of (a vessel) with waterproof material to prevent leakage

Derived Forms

caulker or calker, noun

Word Origin for caulk

C15: from Old Northern French cauquer to press down, from Latin calcāre to trample, from calx heel
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012