他是自愿参加的。
He joined voluntarily.
voluntary
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
Nice writing!
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
他是自愿参加的。
He joined voluntarily.
这是自愿的,不勉强。
This is voluntary, not forced.