daunting
US /ˈdɑːn.t̬ɪŋ/
UK /ˈdɑːn.t̬ɪŋ/

1.
seeming difficult to deal with in anticipation; intimidating
:
•
The task of writing a whole novel is daunting.
•
He faced the daunting challenge of learning a new language.
seeming difficult to deal with in anticipation; intimidating