1. in the sense of basic
- foundational
- basic
- elemental
- rudimentary
- underlying
- elementary
- radical
- basal
- primary
- root
- initial
- cardinal
- prime
- original
- primitive
- first
- principal
- primordial
- capital
- chief
- central
- key
- organic
- structural
- inherent
- constitutional
- ingrained
- intrinsic
- essential
- vital
- indispensable
- important
- crucial
- necessary
- critical
- pivotal
2. in the sense of basics
Example Sentences of Fundamental
1. Education is the fundamental of knowledge growth.
2. Trust is fundamental in building strong relationships.
3. Freedom is fundamental to individual happiness.
4. Honesty is fundamental in gaining respect.