What is one effective method for decoding the meaning of a technical vocabulary words such as cardiorespiratory

One effective method for decoding the definition of cardio respiratory, or any word, is looking at the root word. Cardio is Greek, and refers to the heart. Respiratory refers to breathing, which involves the lungs. So, cardio respiratory is the action of both the heart and the lungs.

Atahualpaemperor of the inca empire who rose to the throne after winning a civil war between him and his brother.  -he refused to become a spanish vassal or christian.-francisco pizarro kidnapped him and demanded a huge ransom.  -pizarro's secretary described him as "a man of thirty years, good-looking and poised, somewhat stout, with a wide, handsome, and ferocious face, and the eyes flaming with blood."-after the ransom was paid, atahualpa was killed by pizarro