🇬🇧 Caulk meaning: English Vocabulary Flash Card

Caulk is a thick, squishy paste that people use to fill cracks and gaps around things like bathtubs, sinks, and windows. When it dries, it becomes rubbery and helps stop water, air, and little bugs from getting through the tiny spaces. Adults squeeze caulk out of a tube in a neat line, then smooth it with a finger or a tool so the gap is sealed and everything stays dry and snug.

The house creaked dramatically until Dad attacked every crack with caulk, turning it from haunted mansion to quiet library.

I asked if we could use caulk to seal my little brother’s mouth; apparently that is “not an appropriate use of building materials.”

I thought the caulk tube was frosting and almost decorated a cupcake until Mom screamed, “That’s for the sink, not your stomach!”

I tried to fix the crack by myself, but now there is more caulk on my nose than on the wall.

Caulk has been used for thousands of years—ancient shipbuilders sealed boat seams with sticky materials like pitch, which was basically old-timey caulk for keeping water out.

Rain drummed on the window. She held a small tube of caulk, saw a thin crack, and squeezed caulk into the gap. The caulk spread soft and white, the caulk sealed it, blocking wind and drip. Later sunlight warmed the dried caulk and she smiled — dry room, quiet night, safe from the storm.

This word is at the C2 level, which means it represents the highest mastery of English. It’s often used in specialized or highly formal contexts and helps you communicate with precision and subtlety, much like a native speaker.

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