Words related to logo-

*leg- (1)

Proto-Indo-European root meaning "to collect, gather," with derivatives meaning "to speak" on the notion of "to gather words, to pick out words."

It forms all or part of: alexia; analects; analogous; analogue; analogy; anthology; apologetic; apologue; apology; catalogue; coil; colleague; collect; college; collegial; Decalogue; delegate; dialect; dialogue; diligence; doxology; dyslexia; eclectic; eclogue; elect; election; epilogue; hapax legomenon; homologous; horology; ideologue; idiolect; intelligence; lectern; lectio difficilior; lection; lector; lecture; leech (n.2) "physician;" legacy; legal; legate; legend; legible; legion; legislator; legitimate; lesson; lexicon; ligneous; ligni-; logarithm; logic; logistic; logo-; logogriph; logopoeia; Logos; -logue; -logy; loyal; monologue; neglect; neologism; philology; privilege; prolegomenon; prologue; relegate; sacrilege; select; syllogism; tautology; trilogy.

It is the hypothetical source of/evidence for its existence is provided by: Greek legein "to say, tell, speak, declare; to count," originally, in Homer, "to pick out, select, collect, enumerate;" lexis "speech, diction;" logos "word, speech, thought, account;" Latin legere "to gather, choose, pluck; read," lignum "wood, firewood," literally "that which is gathered," legare "to depute, commission, charge," lex "law" (perhaps "collection of rules"); Albanian mb-ledh "to collect, harvest;" Gothic lisan "to collect, harvest," Lithuanian lesti "to pick, eat picking;" Hittite less-zi "to pick, gather."

logocentric (adj.)
"centered on reason," 1931, from logo- "reason" + -centric.
logocracy (n.)

"system of government in which words are the ruling powers," 1804; see logo- + -cracy "rule or government by." Popularized by Washington Irving.

In this country [America] every man adopts some particular slang-whanger as the standard of his judgment, and reads everything he writes, if he reads nothing else: which is doubtless the reason why the people of this logocracy are so marvellously enlightened. [Irving, "Salmagundi," 1821]
logogram (n.)
"word-sign, sign or character representing a word," 1840, from logo- "word" + -gram. Generically, "any symbol representing graphically a product, idea, etc.," from 1966. The earliest use of the word (1820) is in the sense "logograph," but OED explains this as a substitute for logograph, "which in this sense is itself a mistake for logogriph," the old type of word-puzzle.
logograph (n.)
"instrument for giving a graphic representation of speech, word-writer," 1879, from logo- "word" + -graph "instrument for recording; something written." Earliest use (1797) is in the sense "logogriph," and it frequently was used in place of that word (see logogriph). In ancient Greek, logographos was "prose-writer, chronicler, speech-writer." Related: Logographic.
logolatry (n.)
"worship of words," 1810 (Coleridge), from logo- + -latry "worship of."
logomachy (n.)
"contention about, or with, words," 1560s, a nativized Latinized form of New Testament Greek logomakhia "a war about words," from logomakhos (see logo- + -machy). Related: Logomach; logomachical.
logomaniac (n.)

"one mad for words," 1870; see logo- "word" + maniac (see mania).

logophobia (n.)
"fear of words," 1890; see logo- "word" + -phobia "fear." Related: Logophobe; logophobic.
logorrhea (n.)
1878, from logo- "word, speech" + ending from diarrhea.