IPA: //dʒækˈtɪʃ.ɪ.teɪ.ʃən//
KK: /dʒækˈtɪʃən/
A type of false claim or boast that can harm someone else's interests, or a state of extreme restlessness and tossing in bed, often seen in certain illnesses.
His constant jactitation about his wealth made others uncomfortable.
Jactitation is formed from "jactare" (meaning to throw) and the suffix "-tion" (indicating the action or process of). The word refers to the act of throwing or tossing about, particularly in a medical context where it describes a restless tossing of the body.
Think of 'throwing' ('jactare') around restlessly, which helps you remember that 'jactitation' refers to the act of tossing about.