In a Word . . . No

From Wikipedia, the free encyclopedia
No is an English/Old English word indicating rejection, disagreement, refusal or making a negative response or exclamation. In most cases it is the opposite of yes.
No has 41 entries in the Urban Dictionary.
No is tied for 2nd place on (no spelled backwards) a long list of short words, beaten out only by A and I. 
No or similar [...]