exterminatingгерундий или причастие настоящего времени Used as an adjective derived from the present participle of "exterminate", typically before a noun.
The exterminating force was relentless in its mission.
Истребительная сила была неумолима в своей миссии.
exterminatingсуществительное Gerund functioning as an uncountable noun meaning the act or process of exterminating.