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From neurasthenia + -ic or neur- + asthenia + -ic. By surface analysis, neur- (“nerve”) + a- (“not”) + sthen- (“strength”) + -ic (“adjective suffix”).
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: Of or pertaining to neurasthenia; that is, tendencies of a person who has suffered a nervous breakdown. Full definition →
From neurasthenia + -ic or neur- + asthenia + -ic. By surface analysis, neur- (“nerve”) + a- (“not”) + sthen- (“strength”) + -ic (“adjective suffix”).
Etymology from Wiktionary, CC BY-SA 4.0.