This is the 519th most frequent Latvian word.
piedalās
"Participates."
In this sentence, 'piedalās' is used to express the subject's regular involvement in an activity or event.
Viņš piedalās sacensībās katru gadu.
He participates in competitions every year.
Here, 'piedaloties' (the gerund form of 'piedalās') indicates an action simultaneous with or leading to the main activity described.
Piedaloties projektā, viņi guva lielu pieredzi.
By participating in the project, they gained significant experience.
'Piedalījies', the past tense form of 'piedalās', is used in a question to inquire about involvement in a past event.