Meaning of the Sanskrit Word: duhkhaih

  duḥkhaiḥ—distresses    Bg 14.20
  duḥkhaiḥ—by miseries    SB 1.5.40
  duḥkhaiḥ—by tribulations    SB 4.29.23-25
  duḥkhaiḥ—by the threefold miseries of material life    SB 7.13.31

Can't find any compound Sanskrit words containing duhkhaih.