形容詞 penal:

1. of or relating to punishment
2. serving as or designed to impose punishment
3. subject to punishment by law
   同義詞：punishable

1. Deportation to a penal colony.
   流放放逐到一個(gè)流刑地

pe.nal

adj.（形容詞）
Of, relating to, or prescribing punishment, as for breaking the law.
屬于、有關(guān)或規(guī)定由于違法處于刑罰的
Subject to punishment; legally punishable:
應(yīng)受處罰的；按法律該受刑罰的：
例句：
a penal offense.
刑事罪

Serving as or constituting a means or place of punishment:
作為處罰或刑罰的方式或地點(diǎn)的：
例句：
penal servitude; a penal colony.
服苦役；監(jiān)禁地

來源：
Middle English
中古英語
from Old French peinal
源自 古法語 peinal
and from Medieval Latin pôn3lis
并源自 中世紀(jì)拉丁語 pôn3lis
both from Latin poen3lis
都源自 拉丁語 poen3lis
from poena [penalty]
源自 poena [懲罰]
from Greek poinô * see k wei-
源自 希臘語 poinô *參見 k wei-

【引伸】
pe.nally
adv.（副詞）