patient (n.) Look up patient at Dictionary.com
"suffering or sick person under medical treatment," late 14c., from Old French pacient (n.), from the adjective, from Latin patientem (see patience).
patient (adj.) Look up patient at Dictionary.com
mid-14c., "enduring without complaint," from Old French pacient and directly from Latin patientem "bearing, supporting, suffering, enduring, permitting" (see patience). Meaning "pertaining to a medical patient" is late 14c., from the noun. Related: Patiently.