乃 nǎi HSK7 then Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: only All meanings 9 nǎi 9 to be 7only 1thus 1 1 sentence for 乃 (nǎi — only) 此时乃悟其意。 cǐshí nǎi wù qí yì. It was only then that I understood his intention. Source: Dong Chinese Dictionary