We should notbelittleothers achievements.

Belittle : dismiss (someone or something) as unimportant.
Recommend : put forward (someone or something) with approval as being suitable for a particular purpose or role.
Praise : express warm approval or admiration of.
Encourage : give support, confidence, or hope to (someone).
Inspire : fill (someone) with the urge or ability to do or feel something, especially to do something creative.
Antonym of Belittle is Praise.