US /ˈʌndɚ peɪn ʌv/
・UK /ˈʌndə peɪn ɒv/
Yeah, under pain of death, presumably.
never under pain of a considerable fine or even a stay in prison.
Leave someone if you need to, but never under pain of a considerable fine or even a stay in prison⏤
Fortunately, however, for the reputation of asteroid B-612, a Turkish dictator made law that his subjects, under pain of death, should change to European costume.