inertadjectivemasculine/feminine/iˈnɛɾtɨ/mediumi·ner·tePortuguesEnglishEspanolFrancaisDefinitionLacking the ability or strength to move; chemically inactive.The victim lay inert on the pavement.Helium is an inert gas that does not react easily with other elements.synmotionlessinactivepassiveantactivedynamicreactiveCommon collocationsinert gasinert materiallie inertEtymologyDo latim 'iners, inertis'.Related wordsinérciainertemente