köken: Borrowed from Old Church Slavonic измъжденъ (izmŭždenŭ), past passive participle of измъждити (izmŭžditi). Related to мозжи́ть (mozžítʹ, “to ache dully but persistently”), мо́зглый (mózglyj, “dank; frail”), dialectal мо́згнуть (mózgnutʹ, “to spoil, to perish”), мзга (mzga, “wet weather”).
köken: From Old Danish maghær, from Old Norse magr (“thin, meager”), from Proto-Germanic *magraz, from Proto-Indo-European *mh₂ḱrós. Compare Ancient Greek μακρός (makrós)