subjunct
/ˈsʌbdʒʌŋkt/noun
- Grammar an adverb or prepositional phrase used in a role that does not form part of the basic clause structure, for example kindly in he kindly offered to help【语法】（由副词或介词短语构成的）次修饰语。
词源
early 20th cent.: from Latin subjunctus, past participle of subjungere （see subjoin）.