次声武器 cìshēngwǔqì infrasonic weapon Origin Definitions Defs Strokes Stroke Words Sentences Sents 次 cì hypo- (bound form) prefix used in chemistry to denote a lower oxidation state声 聲 shēng noun sound sound; voice; noise; something that can be heard武器 wǔqì noun weapon weapon; arms; tools used for military combat or physical destruction