palpitate
verb (used without object)
to pulsate with unusual rapidity from exertion, emotion, disease, etc.; flutter.
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
They were the children of three sisters, and from what Kate knew of their descendants' natures, she felt these sisters must have been palpitating creatures.
From The Precipice by Elia Wilkinson Peattie