If she had been told she was in love, she would have been a good deal surprised; for she had an idea that love was an eager and exacting passion, and her own heart was filled in these days with the impulse of self-effacement and sacrifice.
There are no more uses of "self-effacing" in the book.
Show samples from other sources
Although she is shy and self-effacing, she is fiercely competitive.
Finnick’s real charms of self-effacing humor and an easygoing nature are on display for the first time.