たろう
tarō

Auxiliary Verb

1. ought to have been; was ... right?

かれたすけがなかったら、私わたくし失敗しっぱいしたろう。
kareno tasukega nakattara watashiwa shippai shitarō
Had it not been for his help, I should have failed.
Auxiliary Verb

2. to do for (inferiors)

Kansai Dialect