副詞 apiece:

1. to or from every one of two or more (considered individually)
   同義詞：each, to each one, for each one, from each one

1. The apples are five cents apiece.
   這些蘋果5美分一個(gè)。
2. She gave the boys a dollar apiece.
   她給孩子們每人一美元。

a.piece

adv.（副詞）
To or for each one; each:
各，每：各個(gè)，就每個(gè)而論；各，每：
例句：
There is enough bread for everyone to have two slices apiece.
這兒有足夠的面包，每人可吃兩塊

來源：
Middle English a pece
中古英語 a pece
a [a] * see a 2
a [不定冠詞，表一個(gè)] *參見 a2
pece [piece] * see piece
pece [一部分，一段] *參見 piece