adjunct
/ˈædʒʌŋkt; `ædʒʌŋkt/ n
1 ~ (to/of sth) thing that is added or attached to sth else but is less important and not essential 附加物; 附属品; 附件.
2 (grammar) adverb or adverbial phrase added to a clause or sentence to modify the meaning of the verb 附加语, 修饰语（从句或句子中修饰或限定动词的副词或副词短语）.