没sei了 méiséile unbeatable Definitions Defs Origin Strokes Stroke Words Sentences Sents 没 沒 méi verbadverb not have To be without something; to lack or not possess.sei séile non-Chinese 了 le particle [modal particle] Placed at the end of a sentence to indicate a new situation, a change in circumstances, or to convey imperative or exclamatory force.