好使

be convenient to use; work well

1. 我一直抽烟，好使我不去想自己有多么孤独和焦虑。
   I have been smoking to keep me from thinking about how lonely and anxious I am.
2. 这机器经使用后，很快就会更好使了。
   The machine will soon be easier with use.
3. 我的新钢笔很好使。
   My new pen writes well.

使的英语翻译：