over-optimistic

The word 'over-optimistic' is a modern English compound formed by adding the intensifying prefix 'over-' to the adjective 'optimistic.' The core term 'optimistic' traces back to the Latin optimus, meaning "best," which entered European philosophical vocabulary in the 18th century via French optimisme to describe the doctrine that this world is the best possible. The suffix '-istic' was added to form the adjective. By prepending the Old English prefix 'over-,' meaning "excessively," the compound logically creates a meaning of possessing hopefulness to a fault or beyond a reasonable degree, critiquing a judgment seen as unrealistically positive.

Structure: over (excessive) + optimistic (hopeful) - over: A prefix of Old English origin, from Proto-Germanic uber, meaning "above, beyond, excessively." In this word, it functions as an intensifier meaning "too much." - optimistic: An adjective derived from the noun 'optimism,' which comes from French optimisme, based on Latin optimus (best). The suffix '-istic' forms adjectives meaning "having the qualities of." Its functional role is as the core adjective meaning "hopeful."