A moderate or reasonable level of understanding or skill.

Adequate or satisfactory knowledge.

संतोषजनक ज्ञान

English Usage: His fair knowledge of the subject allowed him to contribute to the discussion.

Hindi Usage: विषय का उसका संतोषजनक ज्ञान उसे चर्चा में योगदान देने की अनुमति देता है।

Treating people equally without favoritism or discrimination.

Reasonable, acceptable, or average.

उचित

English Usage: The ticket price was fair for the concert.

Hindi Usage: संगीत कार्यक्रम के लिए टिकट की कीमत उचित थी।