Usages of tóngyì
学校 已经 同意 了 你 的 申请。xuéxiào yǐjīng tóngyì le nǐ de shēnqǐng.
The school has already approved your application.
周末 我 想 出门 打工， 但是 爸爸 不 同意。zhōumò wǒ xiǎng chūmén dǎgōng, dànshì bàba bù tóngyì.
On weekends I want to go out to do part-time work, but my dad doesn’t agree.
Elon.io is an online learning platform
We have an entire course teaching Chinese grammar and vocabulary.