adverb taking the 'to' particle
Onomatopoeic word for a sharp, light, repeated tapping or clicking sound, such as heels on a hard floor or a keyboard.
彼女のハイヒールが廊下でカツカツと鳴った。
Her high heels clicked on the hallway floor.
キーボードをカツカツと打つ音が聞こえる。
I can hear the clacking sound of typing on a keyboard.
Rare variant kanji form.
Rare variant kanji form with iteration mark.
コツコツ is a similar onomatopoeia for a light tapping or knocking sound, but often implies a softer or more persistent rhythm, like a woodpecker or steady work. カツカツ is sharper and harder.
カチカチ describes a harder, more metallic clicking or ticking sound, or a state of being stiff/frozen. カツカツ is lighter and often associated with footsteps or typing.
Onomatopoeic word; the exact origin is uncertain, but it mimics a sharp, repeated tapping sound.