From Middle English ech other, yche othere, ich othir, eche other, ilk oþer, from Old English ǣlċ ōþer (“each other”), equivalent to each + other. Cognate with Scots ilk other (“each other”), West Frisian elkoar (“each other”), Dutch elkander, elkaar (“each other”).
释义（英文）
代词Pronoun
(reciprocal pronoun) To one another; one to the other; signifies that a verb applies to two or more entities both as subjects and as direct objects: