The Sound of Not Letting Go

クヨクヨ (kuyokuyo) describes the mental loop of dwelling on something — replaying a mistake, worrying about a decision, or being unable to shake off regret. It’s a gijougo (擬情語), an emotion word, and it captures that particular kind of low-energy sadness where your mind keeps circling back to the same painful thought.

When クヨクヨ Comes Up

You’ll often hear クヨクヨ in the phrase 「クヨクヨするな」 (kuyokuyo suru na, “stop brooding” or “don’t dwell on it”) — the kind of encouragement friends give when someone can’t move past a setback. It’s also commonly paired with 悩む (nayamu, to worry): 「クヨクヨ悩む」 means to worry in a way that goes nowhere, just circling the same ground. The word implies that the worrying isn’t productive — it’s the kind that holds you in place rather than leading to a solution.

Fun Fact

クヨクヨ is often contrasted with サッパリ (sappari, refreshed and clean-slated) in self-help contexts and advice columns. The idea is to move from a クヨクヨ state to a サッパリ one — from endlessly replaying the past to letting it go and feeling lighter. This pairing reflects a common theme in Japanese emotional vocabulary: many onomatopoeia come with a natural opposite.