6 letters · 12 points in Scrabble
noun the word class that qualifies verbs or clauses
noun a word that modifies something other than a noun
originBorrowed from French adverbe, from Latin adverbium, from ad- (“to”) + verb(um) (“word, verb”) + -ium, so called because it is used to supplement other words (not specifically verbs). By surface analysis, ad- + verb.
Etymology from Wiktionary, CC BY-SA 3.0