9 letters · 17 points in Scrabble
adjective moving very rapidly to and fro or up and down
originEtymology tree English vibrate Proto-Indo-European *-tōr Proto-Italic *-tōr Latin -tor Proto-Indo-European *-yós Proto-Italic *-ios Old Latin -ios Latin -ius Latin -tōriusder. Middle English -orie English -ory English vibratory From vibrate + -ory.
Etymology from Wiktionary, CC BY-SA 3.0