Kaiden's suffixes!!!

He is feeling very joyous today. What part of speech does the suffix ous have?

Megan is very motherly towards her little brother. What does the suffix ly mean?

I have the ability to be a dancer & a gymnast! What part of speech is the suffix ity?

There is too much starvation in the world. What does the suffix tion most likely mean?

Jane became a biologist when she grew up. What does the suffix sit mean?