challenging
US /ˈtʃæləndʒɪŋ/
・UK /ˈtʃælɪndʒɪŋ/
A2
adjective
- Difficult in an interesting or enjoyable way.
- Difficult to do
- Testing one's abilities; demanding.
other
- Questioning or disputing.
- Inviting to engage in a contest or fight.
- Questioning or disputing something.
verb
- To formally invite someone to compete at something
- To question the correctness of something