Solution:Absurd (Adjective) = (wildly unreasonable; illogical or inappropriate; foolish; iгтеlavant)Sane (Adjective) = (not mad or mentally ill; sound; clever; retional)
Refure (verb) = (indicate or show that one is not willing to do something; forbid; decline)
Silly (Adjective) = (having or showing a lack or common sense or judgement; absurd and foolish)
Anxious (Adjective) = (experiencing worry, or nervousness, easeless.)
Hence, sane is the antonym of absurd.