IM+PERIL=PERIL sounds like PERISH...I'm goin to perish soon...which means I'm put in danger...
im(means no) peril is close to "perl",a very powerful coding language... so if we donnot use perl scripts we are putting our system in risk!
well......imperil can be seen as " in peril " which means in danger............so the meaning of the word, endanger
Imperil : im (Not) peril read it as pil. So if you are having sex without pill there are chances of girl becoming pregnant. So you are putting her in danger