log/logue

word, speech, study

Spelled log, logue · logos 'word, speech, reason'

Greek logos meant word, speech, or reason: dialogue trades speech across people, a monologue speaks alone, and logic follows reason.

Words built from it

dialogue — a conversation between two or more people
dia- (across, between) + logue (speech)
monologue — a long speech by a single speaker
mono- (single) + logue (speech)
catalogue — an organized list of items
cata- (down, in full) + logue (account)
apology — words of regret or explanation
apo- (away, off) + log (speech) + -y
logic — reasoned thought or argument
log (reason) + -ic
geology — the study of the earth
geo (earth) + logy (study of)
eulogy — a speech of praise, especially for the dead
eu- (good, well) + logy (speech)