nán​yú

to be difficult to

难于 難於 nán​yú
to be difficult to
To be hard to do something; to find it difficult to accomplish a specific action
to be harder than
To be more difficult or less easy than something else; often used to compare the difficulty of two tasks

Frequency

Movie subtitles
0.860 per million appears in 0% of films
Written text
6.18 per million

Sources