Homo sapiens n.

"tiny human being produced artificially," 1650s, from Latin homunculus (plural homunculi), literally "little person," with -culus, diminutive suffix, + homo (genitive hominis), which technically meant "male human," but it also was used with a sense "the human race, mankind;" while in Vulgar Latin it could be used as "one, anyone, they, people" and in logical and scholastic writing as "a human being, person."

This is conjectured to be from PIE *(dh)ghomon- (source also of Old Irish duine, Welsh dyn, Breton den "man;" Old Prussian smunents, smunets "man;" Old Lithuanian žmuo "person," Lithuanian žmogus "man," žmones "people," Gothic guma, Old High German gomo, Old Norse gume, Old English guma "man"). The literal sense is "earthling," from PIE root *dhghem- "earth" (compare human (adj.)). Other Latin diminutives from homo included homullus, homuncio.

"wise, sage, discerning," late 15c. (early 15c. as a surname), from Old French sapient and directly from Latin sapientem (nominative sapiens) "sensible; shrewd, knowing, discrete;" also "well-acquainted with the true value of things" (like Greek sophos), a specialized use of the present participle of sapere, of things, "to taste, have taste;" of persons, "to have discernment, be wise."

This is reconstructed to be from PIE root *sep- (1) "to taste, perceive;" source also of Old Saxon ansebban "to perceive, remark," Old High German antseffen, Old English sefa "mind, understanding, insight," Old Norse sefi "thought"). "[N]ow generally used ironically" [Century Dictionary]. Related: Sapiently; sapiential.

Proto-Indo-European root meaning "earth."

It forms all or part of: antichthon; autochthon; autochthonic; bonhomie; bridegroom; camomile; chameleon; chernozem; chthonic; exhume; homage; hombre; homicide; hominid; Homo sapiens; homunculus; human; humane; humble; humiliate; humility; humus; inhumation; inhume; nemo; ombre; omerta.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit ksam- "earth" (opposed to "sky"); Greek khthōn "the earth, solid surface of the earth," khamai "on the ground;" Latin humus "earth, soil," humilis "low;" Lithuanian žemė, Old Church Slavonic zemlja "earth;" Old Irish du, genitive don "place," earlier "earth."