"Exergue" Natural Recordings by Native Speakers
An exergue is a short inscription or phrase written below the title of a book, pamphlet, or other written work, usually indicating who the author is and the year of publication.
Capable of being exercised or put into force; having the power or right to be used or enforced.
Exertions refer to the efforts or strains that someone makes to achieve something, often requiring a lot of physical or mental energy. For example, "After days of exhaustion, the hikers finally reached the summit, exhausted from their considerable exertions."