Elementary (A2)
IPA: /ˌʌnɪnˈθjuːziˌæstɪk/
KK: /ʌnɪnˈθuːziˌæstɪk/
Definition
Not showing excitement or interest; lacking enthusiasm.
Example
She gave an unenthusiastic response to the proposal.
Conversation

Did you notice how unenthusiastic everyone was at the meeting today?

Yeah, it felt like nobody wanted to be there at all.

I guess some topics just don't excite people anymore.

True, maybe we need to find ways to make them more engaging.
Synonyms & Antonyms
Synonyms
apathetic
indifferent
disinterested
Root Explanation
Unenthusiastic → It is formed from "un-" (meaning not) and "enthusiastic" (from Greek "enthousiasmos", meaning inspired or possessed by a god). The word "unenthusiastic" means not inspired or lacking enthusiasm.
Memory Tip
Think of 'not' ('un-') feeling 'inspired' ('enthousiasmos') — that's why unenthusiastic means lacking enthusiasm.
Visually Confused Words
enthusiastic
antienthusiastic
enthusiastical
ultraenthusiastic
enthusiast
pseudoenthusiastic
overenthusiastic
enthusiastically