challenging
adjective/ˈtʃælɪndʒɪŋ/
Frequency rank: #2,916 of 20,003 in the WORDED list (wordfreq data)
Meaning
Difficult in an interesting way that tests your ability.

Example sentence
The new project at work turned out to be very challenging.
Synonyms & related words
More words in ranks 2,901–3,000
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