The closest literal translation would be “terribly” (terribly good, terribly bad).
means strict。Image is of scorpions under a cliff: It’s the crushing of scorpions. hanziyuan.net if you disbelieve me.
is the image of a suspect under a roof being interrogated so we can see his tongue.舌she Tongue under a roof 宀mian = interrogate: its a symbol for the idea of harm, evil, calamity.
HARM EVIL CALAMITY
LIHAI 厉害 crush scorpions torture suspects TERRIBLY memorable — and powerful!
Tsar Ivan the Terrible exemplifies LIHAI.