psychasthenicEtymologyFrom psychasthenia + -ic. By surface analysis, psych- (“soul, mind”) + a- (“not”) + sthen- (“strength”) + -ic (“adjective suffix”).psychasthenic means Affected with, or relating to, psychasthenia. Lexicurio rates it Sui generis — a strength score of 87 out of 100.adjAffected with, or relating to, psychasthenia.nounA person who has psychasthenia.