Hardship
Troubles
noun, verbal noun, な adjective
くろう
苦労 （くろう） Hardship, Troubles
困難 （こんなん） Hardship, Difficulty, Hard, Difficult
玄人 （くろうと） Expert, Professional
The path to becoming an Expert 玄人 くろうと is full of Hardships 苦労 くろう
A crow くろう is a sign of Hardship.
He endured many Hardships while sitting on the Klo くろう (toilet in German).