词根：-grat-

【词根含义】：高兴,恩惠

【词根来源】：来源于拉丁语形容词gratus(令人愉快的)、gratiosus(令人愉快的)和名词gratia(愉快,恩惠)。

【同源单词】：agree, agreeable, agreement, congratulate, congratulation

前缀：a-

【词根含义】：在,到;来,临近;离开;否定;副词前缀;加强意义

【词根来源】：来源于古英语和中古英语a-, an, on。

【同源单词】：aboard, abroad, acentric, across, ago

词根词缀：-able

【来源及含义】Latin: a suffix; expressing capacity, fitness to do that which can be handled or managed, suitable skills to accomplish something; capable of being done, something which can be finished, etc.

【相关描述】A suffix that forms adjectives. The suffix -ible has related meanings; expressing ability, capacity, fitness; capable of, fit for, able to be done, can be done, inclined to, tending to, given to.

This list is only a small sample of the thousands of -able words that exist in English.

【同源单词】abdicable, -able, abolishable, abominable, abradable, acceptable

词根词缀：grat-, gra-, grac-

【来源及含义】Latin: beloved, pleasing, dear, agreeable; grateful, thankful, pleased

【同源单词】agree, agreeable, agreeableness, agreeably, agreement, congratulate