To Support
To Back, To Aid
する verb
To support and aid is to support.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
やる気のある学生がいれば、支援してあげたいと思っています。
If there are well-motivated students, I'd like to support them.
本気でクラウドファンディングでそのプロジェクトを支援するつもりでいたんですけど、気が変わって支援しないことにしたんです。
I was really planning on supporting that project through crowdfunding, but I had a change of heart and decided not to support it.
僕は、他者を支援することは、自分自身を支援することにもつながると思っています。
I believe that supporting others also contributes to supporting oneself.