6 letters · 12 points in Scrabble
adverb to a moderately sufficient extent or degree
adverb without favoring one party, in a fair evenhanded manner
adverb in conformity with the rules or laws and without fraud or cheating
originFrom Middle English fayrly, fayrely, vayrliche, equivalent to fair + -ly.
Etymology from Wiktionary, CC BY-SA 3.0