instrengthen

== English == === Etymology === From in- +‎ strengthen; compare enstrengthen. === Pronunciation === (Received Pronunciation) enPR: ĭnstrĕngʹthə̆n, IPA(key): /ɪnˈstɹɛŋθə̆n/ === Verb === instrengthen (third-person singular simple present instrengthens, present participle instrengthening, simple past and past participle instrengthened) (transitive, rare) Strengthen inwardly. === References === “inˈstrengthen, v.” listed in the Oxford English Dictionary [2nd ed., 1989]