obsolescent

UK: ˌɒbsəˈlesnt | US: ˌɑːbsəˈlesnt

Definition

  1. adj. becoming obsolete; gradually falling into disuse

  2. adj. (Biology) imperfectly developed or rudimentary

Structure
obsolesce <to fall into disuse>ent <adjective suffix>
Etymology

obsolescent = obsolesce<to fall into disuse> + ent<adjective suffix>

  • obsolesce: From Latin obsolescere ("to grow old, wear out"), combining ob- (intensive) + solere ("to be accustomed"). Implies gradual decline.
  • ent: Adjective-forming suffix indicating a state or process (e.g., "fluent," "dependent").

Etymology Origin:
The word traces back to Latin obsolescere, reflecting the idea of aging or fading from use. The prefix ob- intensifies the root solere (habitual action), suggesting a slow, inevitable process. Adopted into English in the 18th century, it originally described objects or customs fading from relevance. The biological sense emerged later, likening underdeveloped traits to "outdated" forms.

Examples

  1. Typewriters are now considered obsolescent technology.

  2. The software will become obsolescent once the new version launches.

  3. Some species exhibit obsolescent organs due to evolutionary changes.

  4. The company phased out its obsolescent manufacturing methods.

  5. Linguists study obsolescent dialects to preserve cultural heritage.