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difficulty; trouble; hardship; shortage
accident; disaster; danger
fault; defect; flaw
criticism; charge; blame
この問題を解くのは難があると感じる。
I feel there is difficulty in solving this problem.
計画には難しい点がいくつかあるようだ。
There seem to be several difficult points in the plan.
難を乗り越えて目標を達成できた。
I overcame the difficulties and reached my goal.