tachy- / brady-

tachy- and brady- mean fast or slow (Greek).

"TACK-ee / BRAY-dee." Coach: "Tachy races; brady takes a break."

Examples: tachycardia, bradycardia, tachypnea, bradypnea, tachyarrhythmia.

Also: bradyarrhythmia, tachysystole, bradykinesia, tachyphylaxis, bradysystole.