abstention (the act of abstaining), nonparticipation

careless, thoughtless, inattentive

carelessness, thoughtlessness, inattention

unwilling, against one's will, reluctant

unwillingness, reluctance

unnecessary

needlessness

(mathematics) an inequality / Futoshiki, a type of logic puzzle

anomaly, abnormality, irregularity / preposterousness; irrationality

abnormal, anomalous; irregular, unordinary / preposterous; irrational; unreasonable