难于 nányú to be difficult to Origin Definitions Defs Strokes Stroke Words Sentences Sents 难于接近 nányújiējìn difficult to approach to be hard to get close to or get along with; specifically used for people who seem cold, unfriendly, or aloof难于登天 nányúdēngtiān harder than climbing to heaven (idiom) extremely difficult; harder than ascending to heaven