I’ve been wondering for a long time when I should use proof and when prove. They seem so awfully similar and I can’t get hands on any good examples that would show the key differences. I know both of the words have to do with confirming or considering as truth of some sort.

What are the key differences between ‘proof’ and ‘prove’? Examples would be much appreciated.

**Answer**

“Proof” and “prove” both come from the same word (Latin *probus*). Usually, “proof” is a noun that means “evidence”, and “prove” is a verb that means “demonstrate”. You *prove* that an accusation is true by showing *proof*.

There are a few special cases to be aware of, but they’re all technical terms:

- So-much-“proof” as an adjective can refer to the alcohol content of a drink (1 proof is 0.5% alcohol by volume). This comes from an old practice of using gunpowder to provide “proof” in the usual sense of the alcohol content.
- Both “proof” and “prove” can be a verb meaning to let bread rise with yeast.
- “Proof” as a noun can mean an example of a product to be produced, such as a book to be printed or a sample copy of a business card. “Proofreading”, meaning to examine a sample copy for errors, comes from this meaning.
- “Something-proof” is an adjective that means “resistant to something”, such as a waterproof tent or soundproof walls.
- A mathematical or logical proof is a specific variety of proof that
*proves*that a conclusion is true if certain assumptions are true.

There are a number of other rare uses of “proof”, but these are the ones you’re likely to encounter. The word proof/prove is a very old one; it at least goes back to Roman Latin, and so it has gained some specific meanings in different fields (such as its use to measure alcohol) that are now far removed from the original processes.

**Attribution***Source : Link , Question Author : 3ventic , Answer Author : chrylis -cautiouslyoptimistic-*