KanjiJLPT N1
Habit

mannerism, habit, vice, trait, fault, kink

Mnemonic

An illness has you bedridden, yet every morning you drag yourself to the bazaar—same stall, same haggling, same pointless routine. Even a raging fever can't break this habit. Your body is wrecked, but the compulsive habit of visiting that bazaar is too deeply ingrained to ever stop.
Additional thoughts
Picture yourself shivering with fever, shuffling through crowded bazaar aisles on autopilot. The illness highlights how irrational the habit is—your body screams to rest, but the ingrained pattern overrides everything.
Quick recall
Despite illness, you compulsively visit the bazaar every day—an unbreakable habit.

Details

The keyword for 癖 is habit. This kanji refers to a deeply ingrained habit, quirk, or peculiarity in a person's behavior that is difficult to change. It often carries a slightly negative connotation, suggesting a mannerism or tendency that may be bothersome or unusual. The character conveys the sense of a persistent, almost involuntary pattern of behavior that has become second nature.
On'yomi
へき
Kun'yomi
くせ、くせ.に