ㄧㄡˇˇˊㄓㄨㄥyǒushǐ‑wúzhōng

有始无终
  1. 開始結尾比喻半途停止不能貫徹到底 做事有始無終終將一事無成」。

to start but not finish (idiom)​; to fail to carry things through, lack of sticking power, short attention span