The word that fits the phrase "behaves like a child" is "immature." It describes someone who exhibits childish qualities or lacks emotional maturity, often demonstrating impulsiveness or a lack of responsibility. This term can apply to both adults and children who display such behaviors.
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.
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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.