caulk
UK: kɔːk | US: kɑːk
n. A waterproof filler or sealant used in building or repair work.
vt. To seal or fill (a gap or joint) with caulk.
The word "caulk" traces back to the Latin calcare, meaning "to tread or press," reflecting the physical action of pressing material into gaps. It entered English via Old French cauquer, evolving to describe the process of sealing seams in ships or buildings. The modern sense retains this core idea of pressing a material to prevent leaks.
The carpenter used caulk to seal the gaps around the window.
Before painting, make sure to caulk all the cracks in the wall.
Traditional shipbuilders caulked the hull with tar and oakum.
A well-caulked bathtub prevents water damage to the floor.
The DIY guide recommended silicone caulk for bathroom repairs.