δαιμόνια [13 verses](noun pl neut acc) "Devils" is daimonion, which means "divinity," "divine power," "a lower divine being," and "evil spirit." Technically, this word means "belonging to a controlling spiritual power." It is from daimôn, which actually is the noun that is translated as "demon." "Evil spirit" is a New Testament usage or interpretation. However, in the Greek Septuagint, the Greek word was used both for the different Hebrew words for "idols" and for "disease,"  but  Greek used it to refer to a controlling spiritual power, inferior to the gods. It was used to mean "knowing" and "skilled" in the sense that we might say, "He is a demon poker player."  In the Stoic philosophy, it was the voice of reason inside of us. Plato described his inner voice of conscience as a daimon. -- "Devil" is a word that means "belonging to a controlling spiritual power" so the sense is "an invisible controller." (CW) The word doesn't necessarily mean "evil". In Greek is used to refer to a controlling spiritual power, inferior to the gods. It was used to mean "knowing" and "skilled" in the sense that we might say, "He is a demon poker player." However, Jesus seems to always use it negatively as "an unseen controller" referring to   invisible causes of disease, especially mental disorders (see this article). In English, our word "daemon" retains these same meanings when it isn't used as an alternate spelling of "demon."  CW --Confusing Word -- This is not the common word translated as "devil." It means "unseen controller," the invisible causes of disease, especially insanity.