cimiento
foundation
Origin: Latin caementum (quarry stone, mortar) — the same root as English 'cement'.
Also means
basis
Usage Note
Cimiento (often plural cimientos) refers to the structural foundations of a building and, figuratively, the foundations of a relationship, institution, or argument (sentar los cimientos de = to lay the foundations of). The plural cimientos is far more common than the singular for the physical sense. Do not confuse with cemento (cement/concrete), which shares the etymology but refers to the material, not the structural element.
Examples
"Los cimientos del edificio son muy sólidos."
Natural Translation
The building's foundations are very solid.

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