1.debilitate
weaken (esp. through heat, hunger, illness); enfeeble(verb) make weak
"Life in the camp drained him"
synonyms : drain , enfeeble

nemo-x
de + ablity = without ability, the person who doesnot have the ablity to do something is called weak.

2.debonair
(of men) friendly, charming, and fashionably dressed; aiming to please; CF. of good disposition

(adj.) having a cheerful, lively, and self-confident air

"looking chipper, like a man...diverted by his own wit", "life that is gay, brisk, and debonair", "walked with a jaunty step", "a jaunty optimist"
synonyms : chipper , debonaire , jaunty

 nemo-x
debonair ~ De+born +Air;the one who born in air has immense cheerfulness.

3.debunk
  expose as false, exaggerated, worthless, etc.; ridicule

(verb) expose while ridiculing; especially of pretentious or false claims and ideas

"The physicist debunked the psychic's claims"
synonyms : expose

nemo-x: 
DE+BUNK..so when you bunked your college, and got caught by your teacher... your teacher exaggerated this fact and ridiculed you in front of the class.

hope u like this ......