also: すいっ
adverb taking the 'to' particle
lightly; nimbly; with a swift motion
Mimetic adverb describing a light, quick, and smooth movement, often used with と (すいと).
猫がすいと窓から出て行った。
The cat slipped lightly out the window.
彼女はすいと立ち上がった。
She stood up nimbly.
Search-only katakana form with a geminate stop; not a standard spelling.
Mimetic word; the exact origin is uncertain, but it likely derives from the sound-symbolic element すい representing smooth, light movement.