Irrational/logical ( Antonym ) Irrational- not logical or reasonable. Logical- of or according to the rules of logic or formal argument.
Irregular/abnormal ( Synonym ) Irregular- not even or balanced in shape or arrangement. Abnormal- deviating from what is normal or usual, typically in a way that is undesirable or worrying.
Irrelevant/unimportant ( Antonym ) Irrelevant- not connected with or relevant to something. Unimportant- lacking in importance or significance.
Nonexistent/occurring ( Antonym ) Nonexistent- not existing or not real or present. Occurring- happen; take place.
Nonverbal/Vocal ( Antonym ) Nonverbal-not involving or using words or speech. Vocal- relating to the human voice.
