ripen

The word 'ripen' is a classic example of a denominal verb formed within English itself. Its core, 'ripe', descends from the Old English rīpe, which is related to the act of reaping harvest, thus carrying the inherent sense of readiness and maturity. The addition of the Old English suffix -en (as in -nian) transforms the static adjective into a dynamic verb, creating the sense "to become ripe." This straightforward morphological process illustrates how English builds new words by combining native elements to express a change of state, moving from the literal condition of fruit to broader applications of development and maturation.

Structure: ripe (adjective) + en (verb-forming suffix) - ripe: From Old English rīpe, meaning "ready for reaping, mature." Its functional role is the core adjective meaning "mature, fully developed." - en: A verb-forming suffix from Old English -nian, used to form verbs from adjectives, meaning "to become or make (adjective)."