jactitation1
/ˌdʒaktɪˈteɪʃ(ə)n
/noun [mass noun] Medicine
1The restless tossing of the body in illness.
1.1The twitching of a limb or muscle.
Origin
Mid 17th century: expressive extension of earlier jactation 'restless tossing', from Latin jactare 'to throw'.
jactitation2
/ˌdʒaktɪˈteɪʃ(ə)n/noun (in phrase jactitation of marriage) archaic
False declaration that one is married to a specified person.
Origin
Late 17th century: from medieval Latin jactitatio(n-) 'false declaration', from Latin jactitare 'to boast'.