Etymology
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lento (adv.)
"slowly" (musical direction), 1724, from Italian lento "slow," from Latin lentus "flexible, pliant, slow, sluggish," from PIE root *lent- "flexible" (see lithe). Related: Lentissimo; lentando ("with increasing slowness").
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lithe (adj.)
Old English liðe "soft, mild, gentle, calm, meek," also, of persons, "gracious, kind, agreeable," from Proto-Germanic *linthja- (source also of Old Saxon lithi "soft, mild, gentle," Old High German lindi, German lind, Old Norse linr "soft to the touch, gentle, mild, agreeable," with characteristic loss of "n" before "th" in English), from PIE root *lento- "flexible" (source also of Latin lentus "flexible, pliant, slow," Sanskrit lithi).

In Middle English, used of the weather. Current sense of "easily flexible" is from c. 1300. Related: Litheness. Old and Middle English had the related verb lin "to cease doing (something)," also used of the wind dying down.
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lemur (n.)

nocturnal Madagascar mammal, 1795, given this sense by Linnaeus, from Latin lemures (plural, singular lemurum) "evil spirits of the dead" in Roman mythology, a word of uncertain origin. De Vaan finds it likely that it and Greek lamia are borrowings of a non-Indo-European (perhaps Anatolian/Etruscan) word for malevolent spirits.

The oldest usage of "lemur" for a primate that we are aware of is in Linnaeus's catalog of the Museum of King Adolf Frederick of Sweden (Tattersall, 1982); .... In this work, he explained his use of the name "lemur" thus: "Lemures dixi hos, quod noctu imprimis obambulant, hominibus quodanmodo similes, & lento passu vagantur [I call them lemurs, because they go around mainly by night, in a certain way similar to humans, and roam with a slow pace]" [Dunkel, Alexander R., et al., "Giant rabbits, marmosets, and British comedies: etymology of lemur names, part 1," in "Lemur News," vol. xvi, 2011-2012, p.65]
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