snelly
quickly; sharply; acutely; coldly
The snaw drives snelly through the dale.
sharply; severely; tartly; curtly
Where it comes from
From Middle English snelly, snellych, snellik, snellich, from Old English snellīċe (“rapidly, quickly, with activity”), from snellīċ (“moving quickly; swift”), equivalent to snell + -ly.
Adapted from the Wiktionary entry snelly (CC BY-SA 4.0).