The correct option is B praise
The word 'belittle' refers to dismissing something or someone as unimportant.
Option A, recommend refers to advising or suggesting something as a course of action.
Option B, praise refers to expressing warm approval or admiration of something.
Option C, encourage refers to giving hope, confidence and support to someone.
Option D, inspire refers to creating a feeling, especially positive one in a person.
Thus, according to the meaning, the word 'praise' is the opposite of the word 'belittle'.