t 1 h 4 i 1 r 1 t 1 i 1 e 1 t 1 h 4
9 letters · 15 points in Scrabble
Meaning
noun position 30 in a countable series of things
adjective coming next after the twenty-ninth in position
originFrom earlier thirteth, from Middle English thrittithe, threttiþe, thrittyde, from Old English þrītigoþa; equivalent to thirty + -eth. For the modern form, see the etymological notes at twentieth.
Etymology from Wiktionary, CC BY-SA 3.0