What is an infinitive and what is a split infinitive?

An infinitive is the basic form of a verb, without an inflection binding it to a particular subject or tense and a split infinitive is a construction consisting of an infinitive with an adverb or other word inserted between to and the verb.

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