Goonish

Part of speech: adjective

Definitions

1. Exhibiting behavior that is clumsy, awkward, or lacking sense
2. Characterized by acting in a silly or tactless manner that seems unintelligent
3. Showing signs of being derisively stupid or socially awkward in conduct

Etymology: "Goonish" is simply "goon" with the adjective-forming suffix "-ish," which attaches the sense of "like" or "having the qualities of" to a noun. The suffix itself is old and productive in English, so the only real question is what a goon is. In this case, the base word carries the whole meaning: a goonish act is one that would be expected of a goon, which here means a foolish or clumsy person rather than a hired thug.

Synonyms: foolish, clumsy, dimwitted

Antonyms: smart, clever, sophisticated