Inert

Inert may refer to:


 * Chemically inert, not chemically reactive
 * Inert gas
 * Noble gas, historically called inert gas
 * Inert knowledge, information which one can express but not use
 * Inert ingredient, a component of the excipient of a pharmaceutical drug
 * Inert munition, a round that does not contain any energetic material
 * Inert prime, a type of behaviour of a prime under an algebraic extension
 * Inert waste, waste which is neither chemically nor biologically reactive and will not decompose