Fatal

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late Middle English (in the senses ‘destined by fate’ and ‘ominous’): from Old French, or from Latin fatalis, from fatum (see fate).

wiktionary

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From Middle French fatal, from Latin fātālis(“fatal”).

etymonline

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fatal (adj.)

ldlate 14c., "decreed by fate," also "fraught with fate," from O French fatal (14c.) and directly from Latin fatalis "ordained by fate, decreed, destined; of or belonging to fate or destiny; destructive, deadly," from fatum (see fate (n.)). Original senses are obsolete; the meaning "causing or attended with death" in English is from early 15c. Meaning "concerned with or dealing with destiny" is from mid-15c.