"penal" in the adjective sense
1. penal
of or relating to punishment
"penal reform"
"penal code"
2. penal
serving as or designed to impose punishment
"penal servitude"
"the juvenile was sentenced to six months in a penal institution"
3. penal, punishable
of an act or offense) subject to punishment by law
"a penal offense"
Source: WordNet® (An amazing lexical database of English)
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