Synonyms of fundamental in English:

fundamental


See US English definition of fundamental

See UK English definition of fundamental

See Spanish definition of fundamental

adjective

1‘a fundamental political principle’

SYNONYMS
basic, foundational, rudimentary, elemental, elementary, underlying, basal, radical, root
primary, cardinal, initial, original, prime, first, primitive, primordial
principal, chief, capital, key, central
structural, organic, constitutional, inherent, intrinsic, ingrained
vital, essential, important, indispensable, necessary, crucial, pivotal, critical
ANTONYMS

secondary, unimportant