unenthusiastic 

英汉解释

adj. 不热心的；不乐观的

反义词

a.   enthusiastic

参考例句

1. an unenthusiastic performance by the orchestra; unenthusiastic applause.
乐队缺乏激情的表演；缺乏热情的鼓掌。
2. If the person answering the call is too lackadaisical, unenthusiastic or indifferent, they may hang up and take their business someplace else!
如果接电话的人很庸懒，缺乏热情或是漠然，他们会挂掉而去找别的客户。
3. But senior Fed officials are unenthusiastic, worrying that further rate cuts will not have much impact and this could weaken confidence further.
不过，美联储高层官员对此并不热衷，他们担心进一步降息不会带来太大影响，反而可能会进一步降低信心。

英英解释

adj.
  1. not enthusiastic; lacking excitement or ardor

网络释义

Unenthusiastic
缺乏热情; 不热心;