Many Japanese think challenge means enter, try or compete. I see it misused on very often on TV and advertisements.
(NG) I will challenge the swimming competition
(OK!) I will compete in the swimming competition
(NG) You should challenge the lottery
(OK!) You should enter the lottery
(NG) I will challenge the test.
(OK!) I will attempt the test
Challenge (動詞) means call to fight
Tom thinks he is better at air hockey. I think I am better at air hockey.
I will challenge Tom in air hockey
Alex thought he was faster than me.
Alex challenged me to a race
A supermarket sold bad meat to a woman. The woman became sick.
The woman challenged the supermarket in court.
Challenging (形容詞) means something is difficult and makes you think
Tests are difficult = Tests are challenging
Solving a Rubik’s Cube is challenging
- Going to be Mars will be very challenging
Challenge (名詞) means a difficult task
I’m going to take the 30 day no karage challenge.