Similar words: challenge, challenged, scavenging, changing, engineering, engine, engineer, heat engine. Meaning: ['tʃælɪndʒɪŋ] 
adj. 1. requiring full use of your abilities or resources 2. stimulating interest or thought 3. disturbingly provocative.
adj. 1. requiring full use of your abilities or resources 2. stimulating interest or thought 3. disturbingly provocative. 
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1. Mike found a challenging job as a computer programmer.
2. She performed the most challenging task without a mistake.
3. She took the offensive, challenging her critics to prove their allegations.
4. Her lawyer is challenging the legality of the court order.
5. Liverpool are challenging for the title .
6. Teaching young children is a challenging and rewarding job.
7. This has been a challenging time for us all.
8. Society is challenging the traditional sexual division of labour.
9. He found the course academically challenging.
10. Campaigners are challenging the safety of genetically-modified food.
11. My interests include anything adventurous or challenging.
12. Many enjoy the mental stimulation of a challenging job.
13. The new play poses some challenging questions.
14. The newspaper was directly challenging the government's legitimacy.
15. Try tennis, badminton or windsurfing. In short,(Sentencedict) anything challenging.
16. She does not like anyone challenging her authority.
17. Mona gave him a challenging look.
18. She was effectively challenging the whole basis on which society was run.
19. It's a challenging job but I'm sure you'll prove equal to it.
20. The new current affairs series promises to address challenging issues with freshness and rigour.
21. The college offers a challenging and stimulating environment in which to study.
22. If tasks are too challenging, the end result is that learners are discouraged.
23. We have changed the course to make it more challenging.
24. He resigned from the company in order to take a more challenging job.
25. Believe that everything happens for a reason. Expect good things to come out of challenging experiences.
26. He left a note at the scene of the crime, challenging detectives to catch him.
27. Building a home from scratch can be both exciting and challenging.
28. I'm ready to do all those things which are more challenging.
29. Most of the discussion was on what needed to be done now as we transitioned from the security issues to the challenging economic issues.
30. This is a book full of profound, original and challenging insights.
More similar words: challenge, challenged, scavenging, changing, engineering, engine, engineer, heat engine, mudslinging, upbringing, ringing, bring in, coming in, belonging, stinginess, discharging, length, chalk, lengthy, at length, lengthways, catch-all, arm's length, wavelength, hang in the balance, hallelujah, sullen, pollen, nonchalant, at arm's length.