zaczęły

zaczęły

"Zaczęły" means "started" or "began" (referring to a feminine or neuter plural subject).

In this sentence, 'zaczęły' is used to indicate the action performed by the subject (dzieci, plural feminine or mixed-gender noun). It is the past tense form in plural.

Dzieci zaczęły śpiewać piosenkę.

The children started singing a song.

Here, 'zaczęły' reflects an action occurring in the past, with 'kwiaty' being the subject (plural noun, grammatically treated as feminine).

Kwiaty zaczęły się otwierać na wiosnę.

The flowers began to bloom in the spring.

In this example, 'zaczęły' refers to the subject 'negocjacje' (plural feminine noun), indicating the beginning of yielding results in the past.

Po trudnym początku, negocjacje zaczęły przynosić efekty.

After a difficult start, the negotiations started yielding results.