词根词缀：brady-

【来源及含义】Greek: slow, slowness; delayed, tardy; a prefix used in the sense of being "abnormally slow"

【同源单词】bradyacusia, bradyarrhythmia, bradyarthria, bradyauxesis, bradycardia, bradycardiac

词根词缀：pneo-, -pnea, -pneic, -pnoea, -pnoeic, -pneo

【来源及含义】Greek: air, wind; breathing

【相关词根词缀】 Word units related to breath and breathe: hal-; pneumato-; pneumo-; psych-; spiro. Cross references of word groups that are related, directly or indirectly, to: "air, wind": aello-; aeolo-; aero-; anemo-; atmo-; austro-; flat-, flatu-; phys-; pneumato-; turb-; vent-; zephyro-.

【同源单词】apnea, apneic, apneusis, bradypnea, dyspneic, eupnea

词根词缀：tacho-, tach-, tachy-

【来源及含义】Greek: fast, speed, swift, rapid

【同源单词】acestachy, acrotach, auxetachy, bradypnea, cardiotachy, hemotachometer