challenging adj.

VERBS be, prove | make sth We have changed the course to make it more challenging. | find sth He found the course academically challenging.

ADV. extremely, very | quite | enough, sufficiently The tasks were not challenging enough for me and I got bored. | academically, intellectually, politically

You can also check other dicts: challenging (English, 中文解释 ), wordnet sense, Collins Definition

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