expletive

详细解释:a. 填补的, 多余的, 附加的, 补足的
n. 语助词, 虚词, 感叹词, 诅咒语, 咒骂语, 惊叹语, 填补物, 附加物

英语解释：

名词 expletive:

profane or obscene expression usually of surprise or anger同义词：curse, curse word, oath, swearing, swearword, cuss