頑張り屋

Meaning

1. n
   someone who battles on in difficult circumstances

Example sentences

• これは、どんながんばり屋でもやる気をなくすほど忍耐のいることだ。

  This is so enduring as to make even the most diligent worker give up.

• トムって頑張り屋だと思う。

  I think Tom is hard-working.