noun-modifying (irregular)
sensible; right-minded; of sound character
Used prenominally to describe a person or action that shows good judgment and moral sense. Often appears in phrases like 良識ある人 or 良識ある判断.
A sensible person wouldn't do such a thing.
I'm grateful for his sensible decision.
Compound of 良識 (good sense) + ある (to exist, to have), literally 'having good sense'. The exact historical derivation is straightforward; the phrase functions as a prenominal adjective.