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English word omen comes from Latin osmen, which itself is of uncertain origin but possibly comes from a combination of Latin os ("mouth") with Latin -men (forms neuter nouns of the third declension.).

Omen etymology ?

Omen detailed word origin explanation

Dictionary entryLanguageDefinition
os Latin (lat) Mouth. (poetic) speech. Face, appearance, head. Opening, entrance Bone. Framework of discourse. Heartwood. The hard or innermost part of trees or fruits.
-men Latin (lat) Forms neuter nouns of the third declension.
osmen Latin (lat) An omen.
omen Latin (lat) An omen.
omen English (eng) (intransitive) To divine or predict from omens.. (transitive) To be an omen of. Something which portends or is perceived to portend a good or evil event or circumstance in the future; an augury or foreboding.. Prophetic significance.

Words with the same origin as omen

Descendants of os
abomination adorable adore ominous oral
Descendants of -men
abdomen discrimination realm regime specimen volume