This is the 2083rd most frequent Russian word.
матери
"Матери" means "mothers" in English.
'матери' is in the dative case, expressing the recipient of the gift.
Это подарок для моей матери.
This is a gift for my mother.
'матери' is in the prepositional case, used to express being about or regarding the mother.
Расскажи мне о своей матери.
Tell me about your mother.
'матери' is in the genitive case, indicating possession (mother's voice).