10 letters · 13 points in Scrabble
adjective of or relating to or shaped like a pentagon
originEtymology tree English pentagon Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al English -al English pentagonal From pentagon + -al.
Etymology from Wiktionary, CC BY-SA 3.0