heteroclite (adj.)

in reference to a word (especially a noun) irregularly inflected, 1570s, from French hétéroclite, from Late Latin heteroclitus, from Greek heteroklitos "irregularly inflected," from hetero- "different" (see hetero-) + verbal adjective from klinein "to lean," from PIE root *klei- "to lean." Figuratively, of persons, "deviating from the ordinary," from 1590s.