neur·asthenic I. \“+\adjective Etymology: New Latin neurasthenia + English -ic : of, relating to, or having neurasthenia < before the neurasthenic tendencies of the patient are developed — Journal American Medical Association > • neu·ras·then·i·cal·ly\-nə̇k(ə)lē, -nēk-, -li\adverb II. noun (-s) : one affected with neurasthenia