ETYM Latin portentosus.
1. Of, relating to, or constituting a portent.
2. Eliciting amazement or wonder; prodigious.
3. Of momentous or ominous significance; SYN. prodigious.
fateful · foreboding · grandiloquent · important · overblown · pompous · pontifical · pretentious · prodigious · prophetic · prophetical · significant