Eng

Strict...

嚴

Rigid, Rigorous, Serious, Severe, Stern, Strict, Tight

嚴厲

Oppressive, Ruthless, Severe, Stern, Strict, Stringent

嚴酷

Harsh, Strict

嚴格

Rigid, Strict, Stringent

森嚴

Fortified, Strict, Well guarded

切實

Certain, Earnest, Real, Strict, Sure, Thorough