Neurotic

wiktionary

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Formed of neuro-(“of nerves or the nervous system”) +‎ -otic(“having abnormal condition”). The initial element, in turn, is from Ancient Greek νεῦρον(neûron, “nerve”). Attested from the 17th century. Compare French névrotique.

etymonline

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neurotic (adj.)

1775, "acting upon or stimulating the nerves," from Greek neuron "nerve" (see neuro-) + -otic, as in hypnotic. Also compare neurosis. Meaning "relating to the nervous system" is by 1873. Sense of "affected by or prone to neurosis" is by 1887. The noun meaning "a neurotic person" is from 1896; earlier it meant "a drug acting on the nerves" (1660s). Related: Neurotically.