IPA: /ˈrɒŋˌhɛdədnəs/
KK: /ˈrɔŋˌhɛdədnəs/
The condition of having ideas or beliefs that are misguided or incorrect.
His wrongheadedness led him to make poor decisions that affected the entire team.
Wrongheadedness → It is formed from "wrong" (from Old English *wrang*, meaning incorrect or unjust) and "headed" (from "head" meaning the part of the body that contains the brain, often used metaphorically to indicate a way of thinking) and "-ness" (a suffix used to form nouns indicating a state or condition). The word "wrongheadedness" refers to the state of having a misguided or incorrect way of thinking.
Think of 'wrong' meaning incorrect and 'headed' relating to one's way of thinking — this helps you remember that 'wrongheadedness' describes a state of thinking incorrectly.