Etymology of the Greek word logikos (λογικός)
the Greek word
logikos, λογικός (rational ('logical'))
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)
Derivations in other languages
Italian
metalogico, Latin
logicus