Collocations for challenging - adj.
VERBS
be, prove | make sth
We have changed the course to make it more challenging.
We have changed the course to make it more challenging.
find sth
He found the course academically challenging.
He found the course academically challenging.
ADV.
extremely, very | quite | enough, sufficiently
The tasks were not challenging enough for me and I got bored.
The tasks were not challenging enough for me and I got bored.
academically, intellectually, politically