This is the 710th most frequent Czech word.
věří
"Věří" means "believes" in English.
Here, 'věří' means 'trusts' and is used in the sense of believing in someone's reliability or honesty.
On věří svému kamarádovi.
He trusts his friend.
In this sentence, 'věří' is equivalent to 'believes' and refers to having faith in an idea or outcome.
Ona pevně věří v úspěch.
She firmly believes in success.
Here, 'věří' is used to denote religious belief, expressing faith in a deity.