がんばりや
someone who battles on in difficult circumstances
Also written がんばり屋
Noun
トムって頑張がんばり屋やだと思おもう。
I think Tom is hard-working.
これは、どんながんばり屋やでもやる気きをなくすほど忍耐にんたいのいることだ。
This is so enduring as to make even the most diligent worker give up.