derivational

noun

1. a deriving or being derived
2. descent or origination
3. something derived; a derivative
4. the source or origin of something
5. the origin and development of a word; etymology
6. 1. Gram. the process of forming words from bases by the addition of affixes other than inflectional morphemes, or by internal phonetic change: the derivation of “warmth” from “warm”
   2. Linguis. in generative grammar, the process of forming sentences