entries → 來回
TSUMUGU · TOCFL B2 (est.) · 詞
來回 word · TOCFL B2 (est.)
來回 ＝ 來 ＋ 回
ㄌㄞˊ ㄏㄨㄟˊ · láihuí
noun — a round trip; adverb — back and forth, to and fro

字源 FORM — what the parts do

來to come (來到)lái
回to go back, to return (回去)huí
來回，來到的來，回去的回。
關 · Related
往返wǎngfǎnto go and come back — the formal twin來來回回láiláihuíhuíback and forth, over and over — the reduplicated form