What is another word for un-enthusiastic?
Pronunciation: [ˈʌnɛnθjˌuːzɪˈastɪk] (IPA) 
Un-enthusiastic refers to a lack of interest or enthusiasm in a particular topic or activity. There are several other ways to describe this state of mind. Some synonyms for un-enthusiastic include disinterested, indifferent, uninvolved, apathetic, listless, and bored. Disinterested suggests a complete lack of interest or involvement, while indifferent implies a lack of preference or concern. Uninvolved suggests a disconnect from the topic or situation. Apathetic implies a lack of emotion or motivation. Listless refers to a lack of energy or vigor. And bored suggests weariness or a lack of stimulation. Regardless of the choice of word, all of these synonyms convey a similar lack of enthusiasm or engagement.
