challenging

they were challenging his leadership.

challenging and rewarding employment.

a challenging course of study; a challenging role for an inexperienced performer.

The newspaper was directly challenging the government’s legitimacy.

in some ways television is more challenging than theatre.

She performed the most challenging task without a mistake.

The new play poses some challenging questions.

We have changed the course to make it more challenging.

Brakes are grabby, occasionally making a slow smooth stop challenging without a hint of whiplash.

His indecision caused him to lose the chance of a new challenging job.

Take challenging composition courses (not just creative writing courses, but classes in journalism, technical writing, etc.) so that you can "speak" journalese, UNese, legalese, etc.

The change cut their expenditures in half, but the new living arrangement proved too challenging.

Early diagnosis of chronic pancreatitis is challenging.

We found getting information just as challenging.

Explosions can be challenging for similar reasons.

The equipment has been challenging to use.

It has the same meaning, it means become less intellectually challenging.

Other legal actions already are challenging the law.

The first few days were the most challenging.

Which of these is the most challenging and why?

In other states, poll watchers also do the challenging.