Made something firmly attached or bonded together, or strengthened a relationship or agreement so it became permanent.
From Latin 'caementum' (rough stone, chips), which evolved into Old French 'ciment.' The verb form developed in Middle English to mean 'to bind with cement' and later metaphorically 'to bind together firmly.'
Cement was originally just broken stone rubble that Romans discovered could harden when mixed with water—the word comes from their word for stone chips! Today we use 'cemented' for anything permanently bonded, from actual concrete to abstract ideas like cemented friendships.
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