minacious

From Late Latin minacia (“threat”) +‎ -ious, from Latin minax (“threatening”) + -ia (suffix forming abstract nouns). Cf. Italian minaccioso, attested 1532.

• (General American) IPA^(key): /məˈneɪʃəs/
• (Received Pronunciation) IPA^(key): /mɪˈneɪʃəs/

minacious (not comparable)

1. (now rare) Synonym of threatening, in its various senses.

• “minacious, adj. and n.”, in OED Online ⁠, Oxford: Oxford University Press, 2022.