c. 1600, in law, "not capable, mentally, of managing one's own affairs," Latin, "not master of one's mind," from non "not" + compos "having power" (from com- "together" + potis "powerful") + mentis "of the mind," genitive of mens "mind."
nominee
nomology
nomothetic
-nomy
non-
non compos mentis
non sequitur
nona-
non-access
non-admission
nonage