onomatopoeia

ガミガミ

being lectured or nagged by a superior

アハハ

a cheerful, loud laugh

ウワーン

a child crying loudly

ウギャー

surprised scream or shriek

ウフフ

chuckling like u have a secret (used primarily by females)

ペチャペチャ

chatting about frivolous things

ゴニョゴニョ

muttering so other people can’t hear u

ペラペラ

speaking a foreign language fluently

オッホン

clearing ur throat for attention

クスクス

laughing quietly unable to hold it in (used primarily by females)

ゴロゴロ

Thunder rumbling / boulder or rock tumbling down a hill

ザーザー

lots of heavy rain pouring down

バタバタ

cloth lightly flapping in the wind

ピューピュー

strong continuous and cold wintry winds

バシャッ

water scattering, splashing forcefully

コボコボ

water bubbling gently

メラメラ

suddenly bursting into flames

サクサク

crispy, specifically crispy food

コロコロ

something small or light quickly rolling down a hill

タタタタ

running at full speed

キラキラ

A glint in your eyes

ホカホカ

A warm body or food

ムシムシ

Unpleasantly hot and humid

ベトベト

Sticky with sweat or blood

ビショビショ

Horribly soaked by a large amount of water

ガタガタ

Shivering or shuddering from the cold

デコボコ

Uneven ground

サンサン

Lots of shining sunlight

ヒンヤリ

Feeling cool

ジンワリ

Soaking slowly with sweat or tears