source: Clapping Illya : Illyasviel

fulfilling expectations or needs; acceptable, though not outstanding or perfect:

〈事が〉 【人にとって/事･物にとって】満足のいく, 納得のいく «to/for» ; 好ましい, 十分な(↔ unsatisfactory)

e.g. the brakes are satisfactory if not particularly powerful.

(of a patient in a hospital) not deteriorating or likely to die.

Law (of evidence or a verdict) sufficient for the needs of the case.

satisfactoriness |ˌsadəˈsfakt(ə)rēnəs| noun

The adjectives satisfactory and satisfying are closely related (both deriving from the Latin satis ‘enough’ + facere ‘to make’), but there is an important distinction. Satisfactory denotes the meeting or fulfillment of expectations, standards, or requirements: the car's satisfactory performance in its first three road tests. Satisfying denotes the same, but goes further to connote the pleasure or enjoyment derived from the satisfaction: it was a satisfying one-dish meal.

late Middle English (in the sense ‘leading to the atonement of sin’): from Old French satisfactoire or medieval Latin satisfactorius, from Latin satisfacere ‘to content’ (see satisfy). The current senses date from the mid 17th century.