challenging
US /ˈtʃæl.ɪn.dʒɪŋ/
UK /ˈtʃæl.ɪn.dʒɪŋ/

1.
menantang, sulit
testing one's abilities; demanding
:
•
Learning a new language can be very challenging.
Mempelajari bahasa baru bisa sangat menantang.
•
She took on a challenging new role at work.
Dia mengambil peran baru yang menantang di tempat kerja.