Gazebo

A small, open-sided building, often in a garden or park, used for sitting, relaxing, or enjoying the view.

Probably invented in 18th‑century English as a playful fake-Latin word from *gaze* + a Latin-style ending *-ebo* (“I shall”). It was meant to sound fancy and classical, as if it meant “I shall gaze.” The joke stuck, and the word became standard.