Invasive

Part of speech: adjective

Pronunciation: /ɪnˈveɪsɪv/

Definitions

1. Describing the act of encroaching upon native ecosystems, it often refers to species that spread in harmful ways and disrupt environmental balance, while also relating to practices that negatively influence existing habitats
2. Characterizing organisms that penetrate and establish themselves in new environments, it pertains to those that adversely affect local flora and fauna, as well as actions that compromise ecological integrity
3. Referring to species that intrude upon and dominate native ecosystems, this term highlights the detrimental effects on biodiversity and the disruption of natural habitats, as well as harmful practices impacting existing environments

Etymology: The adjective "invasive" has a surprisingly military ancestry. Its earliest English form, in Middle English, described a weapon: an invasif weapon was one built for attack rather than defence. The sense of spreading into territory that does not belong to it came later, once the word had been carried into English from Old French, which took it from the Medieval Latin "invasivus". That Latin base is "invadere", "to enter, to invade", built from "in-" (in, into) and "vadere" (to go or rush). So at its root the word simply describes going into somewhere. The "-ivus" ending is the familiar Latin suffix that turns a verb's action into an adjective, meaning "tending to" or "given to" that action. The modern biological sense, of a plant or animal that spreads aggressively and displaces native species, is a far more recent extension of the same idea of entering where one is not wanted.

Synonyms: intrusive, encroaching, penetrating

Antonyms: non-invasive, harmless