ちゃんと・きちんと

ちゃんと and きちんと are both adverbs meaning doing something correctly, properly, or thoroughly. They are used before verbs to indicate that the action is carried out carefully and as it should be, rather than sloppily or carelessly. ちゃんと is common in everyday speech and can feel a bit more casual or everyday, while きちんと carries a slightly stronger nuance of formality, orderliness, and discipline. Both can modify actions (eating, cleaning, keeping promises, following rules) or be used with verbs like する/やる/守る/整える.