(Jocose) Robert can be quite...

[barnej0096]

Robert can be quite... (jocose). He's frequently making jokes. Which word should I use in this sentence?

[Grumpy]

It depends on whether you wish to be complimentary or not. If the former, then you could use "witty", "humorous","funny", "comical", "droll", or even "jocular". If the latter, then "facetious", flippant", or "irreverent" could nail him.

[Raymott]

Robert can be quite... (jocose). He's frequently making jokes. Which word should I use in this sentence?

Again, barnej0096, we shouldn't have to guess what the exercise is.
If you have to use a derivative of 'jocose', the answer is 'jocular'.

[barnej0096]

Thanks, I was to complete this sentence with the correct form of the word 'jocose'.

[Tdol]

Jocular it is, then.