8 letters · 13 points in Scrabble
adjective so thin as to transmit light
adjective resembling or characteristic of vapor
adjective filled with vapor
originFrom Middle English vaporous, from Late Latin vapōrōsus (“full of steam”), from Latin vapor (“exhalation; smoke; steam, vapour”) (possibly related to Proto-Indo-European *kwep- (“to boil; to smoke, steam; aroma; strong odour”)) + -ōsus (suffix meaning ‘full of, overly, prone to’ forming adjectives from nouns). The English word is analysable as vapour + -ous. Possibly a doublet of hope. Cognates *…
Etymology from Wiktionary, CC BY-SA 3.0