The correct option is C disapproved
The word 'admired' refers to regarding someone with respect or warm approval.
Option A, disappointed refers to feeling saddened or let down by something or someone.
Option B, discarded refers to getting rid of something as no longer useful or desirable.
Option C, neglected refers to not receiving proper attention.
Option D, disapproved refers to having or expressing an unfavorable opinion.
Thus, according to the meaning, the word 'disapproved' is the opposite of the word 'admired'.