Guī(歸) and huí(回) both convey the meaning of going back to someplace. Guī(歸) usually doesn’t use as a verb alone. It usually appears in compound words such as four-word idioms. Huí(回) can either take an object itself or be used after a verb to form a verb phrase.
wú jiā kě guī róng guī gù lǐ
to be homeless return to one’s native place with high honors
wǒ míng tiān guī jiā.
wǒ míng tiān huí jiā.
I will go home tomorrow.
Please put this book back to its original place.
When guī(歸) itself severs as a verb, it means “belong to”, and it must take an object.
tā bān zǒu zhī hòu, zhè jiān wū zǐ jiù guī nǐ le.
This room will belong to you after he moves out.
Huí(回) also could be used when to express the meaning “ to reply, or answer”, in this case, it can take one or two objects.
wǒ wǎn shàng huì gěi tā huí gè diàn huà.
I'll call him back in the evening.
tā huí le wǒ yī fēng xìn, wǒ hái méi yǒu kàn.
He answered me a letter, but I haven’t read it yet.