Fart is an English language onomatopoeia, most commonly used in reference to flatulence. The word "fart" is generally considered unsuitable in formal situations as it may be considered vulgar or offensive. Fart can be used as a noun or a verb. The immediate roots are in the Middle English words ferten, feortan or farten, kin of the Old High German word ferzan. Cognates are found in old Norse, Slavic and also Greek and Sanskrit. The word "fart" has been incorporated into the colloquial and technical speech of a number of occupations, including computing.