The ecliptic is on the Earth's orbit.

He explained to me in detail about the constellations of the zodiac.

Let's play koi-koi tonight.

I am doing volunteer work to contribute to the community.

He was watching the situation as a detached observer.

His contribution led our project to success.

He became my guardian.

She is entrusted with the guardianship of the elderly.

She ended up having to watch over her sick grandmother.

My grandmother likes to plant kōkōimo (a type of potato).