12 letters · 20 points in Scrabble
noun the act or process of complicating
noun a situation or condition that is complex or confused
noun any disease or disorder that occurs during the course of (or because of) another disease
originBorrowed from Middle French complication, from Latin complicatio, complicationem. Morphologically complicate + -ion.
Etymology from Wiktionary, CC BY-SA 3.0