potsu-potsu（ポツポツ）
1. Light, sparse raindrops
zaa-zaa（ザーザー）
1. Heavy, continuous rainfall
shito-shito（シトシト）
shito-shito describes light, quiet, and continuous rainfall.
gaku-gaku（ガクガク）
gaku-gaku describes a repeated, unsteady trembling or shaking motion, often caused by weakness, fear, cold, or exhaustion.
pusu-pusu（プスプス）
pusu-pusu describes a faint, weak sound of air, heat, or energy escaping, often associated with smoldering, leaking, or something gradually losing strength.
kusu-kusu（クスクス）
kusu-kusu describes a soft, restrained form of laughter, typically a quiet chuckle or giggle made under one’s breath.
gera-gera（ゲラゲラ）
gera-gera describes loud, unrestrained laughter marked by a sharp, open sound.
niya-niya（ニヤニヤ）
niya-niya describes a sly, smug, or suggestive grin that continues over time.
niko-niko（ニコニコ）
niko-niko describes a state of smiling cheerfully and continuously.
ira-ira（イライラ）
ira-ira describes a state of irritation, agitation, or growing frustration.