challenging

US /ˈtʃæl.ɪn.dʒɪŋ/

UK /ˈtʃæl.ɪn.dʒɪŋ/

1.

testing one's abilities; demanding

:

•

Learning a new language can be very challenging.

•

She took on a challenging new role at work.

:

demanding difficult arduous tough formidable

:

easy simple effortless

:

challenge challenger