also: なっとくのゆく
expression, noun-modifying (irregular)
satisfactory; convincing; acceptable
Used prenominally to describe something that is convincing or meets one's expectations; often in phrases like 納得のいく説明 (a convincing explanation).
See also: 納得がいく
彼は納得のいく説明をしてくれた。
He gave me a convincing explanation.
納得のいく結果が出るまで話し合いましょう。
Let's discuss until we reach a satisfactory result.
納得がいく is a verb phrase meaning 'to be convinced' or 'to make sense', while 納得のいく is its prenominal form used to modify nouns.
Phrase consisting of 納得 (understanding, conviction) + の (possessive particle) + いく (to go, to be acceptable). Literally 'going of understanding', i.e., something that leads to understanding or acceptance.