9 letters · 15 points in Scrabble
noun a police officer who investigates crimes
noun an investigator engaged or employed in obtaining information not easily available to the public
originThe adjective is from Classical Latin dētēct-, past participial stem of dētegō (“to detect”), + -ive. The noun is an ellipsis of detective policeman, detective officer, or a similar construction. By surface analysis, detect + -ive.
Etymology from Wiktionary, CC BY-SA 3.0