My friend Mike is callow, he behaves like an infant child.
The word behavior is a noun. It is the way in which one behaves.
One suffix that can be added to a word to mean "like a child" is "-like". For example, the word "childlike" means resembling or characteristic of a child.
The expression is "fits and starts."
He has been a democrat all of his life.He claims to be a democrat yet behaves like a dictator.
"Refugee" is a noun, but it has no adverb form. This is the most straightforward answer you can get. As a guide, you can try to put the word into a sentence (in the position of an adverb or adjective) and see if it fits in. In this case, if you can say "He is refugeeish" (meaning "he behaves like a refugee"), then the word "refugee" has an adjective form, and if you can say "He talks refugeeishly" (meaning "he talks like a refugee"), then the word has an adverb form. For both cases, you can't do it, so you can safely conclude that refugee is a noun that has no adjective or adverb form.
Please provide the sentence in which you would like the word "child's" used.
document
Behaves, obeys, is compliant
i felt like a child again.
Condescend
The word behaviour is a noun. It is the way in which one behaves.