7 letters · 12 points in Scrabble
adjective very unpleasant
adjective resembling a beast; showing lack of human sensibility
adverb in a beastly manner
originFrom Middle English bestely, bestly, equivalent to beast + -ly. Compare West Frisian bistachtich (“beastly”), Dutch beestachtig (“beastly”), German biestig (“beastly”).
Etymology from Wiktionary, CC BY-SA 3.0