A difficult task or situation to handle.
Трудная задача или ситуация, с которой нужно справиться. (trudnaya zadacha ili situatsiya s kotoroy nuzhno spravitcya)
"Starting a new business is a tough row to hoe."
"Начать новый бизнес — трудная задача." (nachat noviy biznes trudnaya zadacha)
sign of hope after a difficult period
to stop something; to end support for a project or activity
to stop being responsible for something
very quickly; almost immediately
the least reliable or secure part of a system or group
to criticize someone harshly