gnaw is used generally for some animals like mouse and all. we can use it on human also.Gnaw is
attention: this word need no furthur any attention.
draconian : the condition is draconian as compared to my expertize.
duress : The kindnapping of Lord Ram in Ramayana was done with duress.
candore : i really appreciate your candor when you told me whole truth about me.
chew slowly : i was left agaped and was chewing slowly in astonishment.