myEtymology.com: Greek etymology of alogos

Etymology of the Greek word alogos (ἄλογος)

the Greek word alogos, ἄλογος (irrational)

derived from the Greek word logos, λόγος (word, speech, topic, treatise, reasoning)

derived from the Greek word legein, λέγω (to speak)

derived from the Proto-Indo-European root *leg- (to collect, to speak)

using the Greek prefix a-, ἀ- (an- not, without)

Latin alogia