Adverb (fukushi), Adverb taking the 'to' particle
lightly and smoothly (of movements); swiftly; glidingly
Onomatopoeic or mimetic word
ヤンマがすいすいと水の上を進んでいた。The dragonfly was skimming across the water. (progressing) smoothly; (solving) easily
Onomatopoeic or mimetic word
Also written すいすい