Kindness, Love
Noun
じあい
彼女は慈愛に満ちた微笑を僕に向けた。
She turned her affectionate smile toward me.
When you have mercy upon those you love it's called affection. You end up doing things out of the kindness of your heart because they mean a lot to you.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.