adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
dizzy; giddy; lightheaded
Describes a sensation of dizziness, spinning, or feeling faint, often from heat, illness, or standing up too quickly. Commonly used with する or と.
暑さで頭がクラクラする。
I feel dizzy from the heat.
立ち上がったらクラクラっとした。
I felt lightheaded when I stood up.
adverb, adverb taking the 'to' particle
boiling vigorously; bubbling up
Describes liquid boiling or bubbling up intensely. Often used with と. Less common than the dizziness sense.
鍋のスープがクラクラと煮立っている。
The soup in the pot is boiling vigorously.