being volatile (evaporating or vaporizing readily under normal conditions), volatility

An establishment featuring music and dance as well as food and drink, a night club / (now especially) An establishment in which hostesses serve drinks to and talk with clients in exchange for payment

academic (scholarly; literary or classical, in distinction from scientific)

manicure / applying nail polish / nail polish

unscientific

adventurous (full of hazard)

aggressive

aggressive, offensive

frank, open, blunt / lewd, obscene

backup (copy of file or record)