A difficult task or challenge.
एक कठिन कार्य या चुनौती। (Ek kathin kary ya chunauti.)
"Getting this project done on time is going to be a hard row to hoe."
"समय पर इस परियोजना को पूरा करना एक कठिन कार्य होगा।" (Samay par is pariyojna ko pura karna ek kathin kary hoga.)
a problem or error in a program or system
to take on a lot of responsibility
to move up in position or success, especially in a career
someone who is very dear and loved deeply
all day and all night; continuously
feeling discouraged or sad