penal

adjective

1. of, relating to, or involving punishment, as for crimes or offenses.
2. prescribing punishment: penal laws.
3. constituting punishment: He survived the years of penal hardship.
4. used as a place of confinement and punishment: a penal colony.
5. subject to or incurring punishment: a penal offense.
6. payable or forfeitable as a penalty: a penal sum.

adjective

1. of, relating to, constituting, or prescribing punishment
2. payable as a penaltya penal sum
3. used or designated as a place of punishmenta penal institution

adj.“pertaining to punishment,” mid-15c., from Old French peinal (12c., Modern French pénal) and directly from Medieval Latin penalis, from Latin poenalis “pertaining to punishment,” from poena “punishment,” from Greek poine “blood-money, fine, penalty, punishment,” from PIE *kwoina, from root *kwei- “to pay, atone, compensate” (cf. Greek time “price, worth, honor, esteem, respect,” tinein “to pay a price, punish, take vengeance;” Sanskrit cinoti “observes, notes;” Avestan kaena “punishment, vengeance;” Old Church Slavonic cena “honor, price;” Lithuanian kaina “value, price”).