Meanings
Noun
difficult problem; challenge
Example sentences
それは難題だ。
That's a tall order.
それは難題だな。
It is a difficult problem.
医者は難題を抱えている。
Doctors have a difficult problem.
君はそれらの難題に対処しなくてはならない。
You have to cope with those difficult problems.
一難去ってまた一難、またまた難題が社長からトップダウンで降りてきたよ。
No sooner had we finished working on one tough problem than the president sent us yet another straight from the top.