fundament
fun·da·ment
noun
1.
the fundamental assumptions from which something is begun or developed or calculated or explained
- “the whole argument rested on a basis of conjecture”
2.
3.
- “it was built on a base of solid rock”
- “he stood at the foot of the tower”
Origin
From Middle English, from Old French fundement, fondement, from Latin fundāmentum (“foundation”), from fundō (“to lay the bottom, to found”). Doublet of fondamento.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.