10 letters · 12 points in Scrabble
adjective of momentous or ominous significance; - Herman Melville
adjective ominously prophetic
adjective puffed up with vanity; ; ; ; - Newsweek
originOf multiple origins: * Borrowed from Latin portentōsus, from portentus (“predicted”) + -ōsus. Compare earlier portentuous (via Middle English from Latin portentuōsus). By surface analysis, portent + -ous. * Borrowed from French portentueux
Etymology from Wiktionary, CC BY-SA 3.0