mutual

詳細解釋：

mu.tu.al

adj.（形容詞）
Having the same relationship each to the other:
彼此相關的：相互之間有共同關係的：
例句：
mutual predators.
彼此相關的肉食性動物

Directed and received in equal amount; reciprocal:
相互的，彼此的：等量指導的或以相等的數量接受的；互惠的：
例句：
mutual respect.
相互之間的尊敬

Possessed in common:
共同擁有的：
例句：
mutual interests.
共同的利益

Of, relating to, or in the form of mutual insurance.
相互保險的：相互保險的，有關相互保險的或相互保險形式的
n.（名詞）
A mutual fund.
信託基金

來源：
French mutuel
法文 mutuel
from Old French
源自 古法文
from Latin môtuus [borrowed] * see mei-
源自 拉丁語 môtuus [借] *參見 mei-

【引伸】
mu.tual.ity
mu.tually
adv.（副詞）
Mutual is uncontroversially used to describe a reciprocal relationship between two or more things, in which use it can be paraphrased by expressions involvingbetween or each other. Thustheir mutual animosity means .their animosity for each other. or .the animosity between them,. anda mutual defense treaty is one in which each party agrees to come to the defense of the other. Butmutual is also widely used where one might expect .common,. as inThe bill serves the mutual interests of management and labor and particularly in the expressionour mutual friend, which was widespread even before Charles Dickens used it as the title of a novel.Critics have often objected to this use,but it is well established in reputable writing.However,mutual in this latter sense is reserved to describe relations that hold between two or more specific parties and a third person or thing. It cannot be used as a substitute forcommon in the sense .general.:
Mutual 毫無爭議地被用來描述兩者或者更多事物之間的相互關係， 可以用一些包括between 或 each other 的表達來解釋。 因此他們相互的敵意 意思為.他們彼此之間產生的敵意.或者.他們之間的敵意.， 相互防禦條約 意為一個政黨同意幫助另一政党進行防禦的條約。 但是Mutual 也廣泛地用來表示.共同的.， 就象在這個議案滿足勞資雙方的需要。 特別是在短語我們共同的朋友， 甚至在查理·狄更斯把它作為一本小說名之前就已經廣泛套用。評論家們一直以來常常反對這種用法，但是在規範的寫作中它已被完全確定下來了。但是mutual 後來產生的意思被用來描述兩個或者更多特定元素及物和第三者之間的關係。 當意為.普遍的.時，它不能代替common 來表述.總體.的含義：
例句：
English is the common (not mutual ) language of the island.
英文是。（而不用 mutual ） 這個島的通用語。

例句：
It is commonly (not mutually ) believed that Spanish is an easier language than French.
（而不用 mutually ） 相信西班牙語是一種比法文簡單的語言