Libido
来自Big Physics
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early 20th century: from Latin, literally ‘desire, lust’.
wiktionary
Learned borrowing from Latin libīdō(“lust, desire”). Used originally in psychoanalytic contexts.
etymonline
libido (n.)
"psychic drive or energy, usually associated with sexual instinct," 1892, carried over untranslated in English edition of Krafft-Ebing's "Psychopathia Sexualis"; and used in 1909 in A.A. Brill's translation of Freud's "Selected Papers on Hysteria" (Freud's use of the term led to its popularity); from Latin libido, lubido "desire, eagerness, longing; inordinate desire, sensual passion, lust," from libere "to be pleasing, to please," from PIE root *leubh- "to care, desire, love" (source also of love).
