snelly

The story

1. Old English · inherited fromsnellīċe“rapidly, quickly, with activity”
2. Middle English · inherited fromsnelly
3. English todaysnelly

From Middle English snelly, snellych, snellik, snellich, from Old English snellīċe (“rapidly, quickly, with activity”), from snellīċ (“moving quickly; swift”), equivalent to snell + -ly.