accustomed/ə'kʌstəmd/

a. if you are accustomed to sth, it is usual to you

a. [be/get accustomed to (doing) sth] 习惯于：He's not accustomed to getting up early. 他不习惯早起。

◇They are accustomed to not talking at meals. 他们吃饭时一般都不说话。

构词ac (= ad-) + custom（习惯） + -ed