LATIN DICTIONARYLexicon Latīnum
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“swoon” in Latin

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

swoon s.
subita defectio (Suet., Calig., 50); in more modern Latin, deliquium, syncope (medical technical term).
swoon v.
animus aliquem linquit, deficit (Curt.): anima deficit (Cels., 1, 17): animo linqui aliquis coepit (Curt.): animo linqui (Sen., De Ir., 1, 12, 2): animus aliquem relinquit (Caes., B.G., 6, 38): intermori (Liv.): collabi (Suet.).

Quick answer

What is the Latin word for swoon?
The usual Latin words for “swoon” are dēliquium, syncŏpē, dēficiō; also intermorior, collābor. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.