Prefix - Not

Choose an antonym for irregular

• abnormal
• typical

Choose an antonym for nonexistent

• actual
• absent

Choose an antonym for irrelevant

• meaningful
• unnecessary

Choose an antonym for nonverbal

• vocal
• quiet

Choose an antonym for irrational

• sane
• ridiculous

Choose a synonym for incapable

• unable
• forfeit

Choose a synonym for ineligible

• jobless
• unsuitable

Choose a synonym for imbalance

• disproportion
• weakness

Choose a synonym for illiterate

• uneducated
• stable

Choose a synonym for illogical

• absurd
• reasonable