6 letters · 10 points in Scrabble
verb be unbearably loud
verb make or render deaf
verb make soundproof
originFrom deaf + -en (verbal suffix). Compare Middle English deven, deaven (“to make deaf”), Old English ādēafian (“to deafen”) and Old English ādȳfan, Dutch verdoven (“to stupefy, deafen”), German betäuben (“to stun, stupefy, deafen”).
Etymology from Wiktionary, CC BY-SA 3.0