Is Irreproachably a Word?

adj. Perfect or blameless in every respect; faultless: irreproachable conduct.

How do you spell irreproachable?

free from blame; not able to be reproached or censured.

Why is someone a killjoy?

A killjoy is a person who spoils all the fun for everybody. You may be a killjoy if everyone's enjoying their meal at a restaurant and you complain constantly about the terrible service. ... There are some other great old-style slang phrases to describe the person who pops your balloon or rains on your parade.