IPA: /mɒnˈstrɒsɪti/
KK: /mɑnˈstrɑsɪti/
A very large and ugly creature or thing, often causing fear or disgust.
The old building was a monstrosity that scared away visitors.
Monstrosity → It is formed from "monstrum" (from Latin, meaning a monster or something abnormal) and "-osity" (a suffix indicating a state or condition). The word "monstrosity" refers to the state or condition of being a monster or something that is grotesquely abnormal.
Think of 'monstrum' which means monster, and remember that 'monstrosity' describes the state of being monstrous or grotesque.