8 letters · 13 points in Scrabble
adjective of or relating to or forming an isthmus
originEtymology tree English isthmus Proto-Indo-European *-nós Proto-Italic *-nos Latin -nus Latin -ānus Latin -iānusbor. English -ian English isthmian From isthmus + -ian.
Etymology from Wiktionary, CC BY-SA 3.0