Added 24 October 2026 portentously /pɔː(ɹ)ˈtɛn.təs.li/ adverb Categories: Describing WordsRare Words adverb ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about portentously at Wordnik → Where our words come from → In an ominous manner. In a pompous manner. Related Words: ominouslyforebodinglymenacinglydarklythreateninglydauntinglyeerilyinauspiciouslyscarilyintimidatinglybodinglyalarmingly Back to today's word