an oath or swear word 诅咒语 ■(Grammar)a word or phrase used to fill out a sentence or a line of verse without adding to the sense (语法)填充词(或短语);语助词;虚词
adjective
(Grammar)(of a word or phrase) serving to fill out a sentence or line of verse (语法)(词,短语)填补的;补足的;附加的
语源
late Middle English (as an adjective): from late Latin expletivus, from explere 'fill out', from ex- 'out' + plere 'fill'. The general noun sense 'word used merely to fill out a sentence' (early 17th cent.) was applied specifically to an oath or swear word in the early 19th cent