至難

しなん
most difficult
next to impossible

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しなん【至難】

¶ → 至難の技

¶辞書を2年で作るなんて～の技だ

It is the most difficult task to compile a dictionary in two years.

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しなん【至難】

●至難の[な] most difficult

・至難の業(_わざ) a virtually impossible task; a task of extreme difficulty; something practically impossible to bring off.