名詞 foundling:

1. a child who has been abandoned and whose parents are unknown
   同義詞：abandoned infant

1. He is a foundling, and has grown up in a school for homeless boy.
   他是個(gè)棄兒，在為無家可歸的男孩而開設(shè)的學(xué)校里長大。

found.ling

n.（名詞）
A deserted or abandoned child of unknown parentage.
棄嬰，棄兒：一個(gè)不知父母為誰的棄嬰

來源：
Middle English
中古英語
from found [past participle of] finden [to find] * see find
源自 found [] finden的過去分詞 [尋找] *參見 find