func·tor
noun/ˈfʌŋktə(r)/
/ˈfʌŋktər/
- (mathematics) a function or a symbol such as + or ×
函子 - (also function word)(grammar) a word that is important to the grammar of a sentence rather than its meaning, for example ‘do’ in ‘we do not live here’
功能词，虚词（如 we do not live here 中的 do 一词）
Word Origin1930s: from function, on the pattern of words such as factor.