добровольный

добровольный

Voluntary.

Here, the word 'добровольный' is used as an adjective to describe the basis of participation, highlighting that the involvement is voluntary and by one's own decision.

Я участвую в этом проекте на добровольной основе.

I participate in this project voluntarily.

In this sentence, 'добровольный' qualifies the fundraiser as something individuals choose to participate in without obligation.

У нас прошел добровольный сбор средств на помощь пострадавшим.

We had a voluntary fundraiser to help the victims.

Here, the word 'добровольный' denotes that the agreement was signed willingly and not under any form of coercion.

Все члены клуба подписали добровольное соглашение.

All club members signed a voluntary agreement.