This is the 666th most frequent Latvian word.
kļuvusi
The Latvian word "kļuvusi" means "has become" in English.
In this sentence, "kļuvusi" means "has become" and indicates a change in status or condition, presented in the perfect tense.
Viņa ir kļuvusi par manu labako draudzeni.
She has become my best friend.
Here, "kļuvusi" illustrates a transformation or change of state referring to the river in the context of the season, using perfect tense.
Rudenī upe kļuvusi mierīga.
In autumn, the river has become calm.
"Kļuvusi" conveys a completed state of transformation or change, functioning within the past participle structure to describe the subject's status.