foundational

English

Etymology tree

Proto-Indo-European *dʰewbʰ-?

Proto-Indo-European *-mḗn

Proto-Indo-European *bʰudʰmḗn

Proto-Indo-European *-nós

Proto-Indo-European *bʰudʰnós

Proto-Indo-European *bʰundʰós

Proto-Italic *fundos

Latin fundus

Proto-Indo-European *-h₂

Proto-Indo-European *-éh₂

Proto-Indo-European *-yéti

Proto-Indo-European *-eh₂yéti

Proto-Indo-European *-h₂tiinflu.

Proto-Italic *-ājō

Proto-Italic *-āō

Latin -ō

Latin fundō

Proto-Indo-European *-tis

Proto-Indo-European *-Hō

Proto-Indo-European *-tiHō

Proto-Italic *-tiō

Latin -tiō

Latin fundātiōder.

Old French fondacionbor.

Middle English foundacioun

English foundation

English -al

English foundational

foundational (comparative more foundational, superlative most foundational)

Of or relating to a foundation or foundations.
Fundamental or underlying.
- 2020 June 2, David S. Cohen, “Donald Trump Is Trying to Start a Race War”, in Rolling Stone‎^[1], archived from the original on 3 June 2020:
  Racism courses through Donald Trump’s blood and is one of the foundational principles of his presidency. Which is why, when faced with one of the greatest uprisings against police brutality this nation has seen, a movement led by black people around the country and joined by all other people of color and white people as well, his only policy solution is to start a race war.