カチカチ

with a ticking sound, rock-hard, completely hard

→ かちかち
adverb Rare #31,141
with a ticking sound Often describes the sound of a clock.
JA: 時計がカチカチと鳴っている。
EN: The clock is ticking.
rock-hard, completely hard Describes something that has become very hard, often from freezing.
JA: 水がカチカチに凍った。
EN: The water froze solid.

聞こえる音は時計のカチカチという音だけだった。

The only sound that could be heard was the ticking of the clock.

カチカチに凍ってる。

It's frozen solid.

夜寝れない時に限って、時計のカチカチいう音が気になるものだ。

It’s always when you can’t sleep at night that the ticking of the clock starts to bother you.

カチカチだ。

It's rock hard.

カチカチ

Click, click.

— Good Luck, Have Fun, Don't Die (2026)