byword
/ˈbaɪwɜ:d; `baɪˌwəd/ n
1 ~ for sth person or thing considered to be a notable or typical example of a quality 代表某种品性的人或事物
His name has becomea byword for cruelty. 他的名字成了残酷无情的别称.
The firm is a byword for excellence. 这家商号是优质的保证.
2 common saying or expression 俗语; 谚语.