| ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ adjective
1. : single 7a
the perfect, single-hearted, crusading knight — H.O.Taylor
2. : characterized by or resulting from sincerity and unity of purpose or dedication
such a task requires an expenditure of time and energy, a single-hearted consecration — B.N.Cardozo
the man who seizes on one deep-reaching idea … and with single-hearted fervor forces it upon the world — P.E.More
her lifelong, single-hearted, and unshakable conviction — Albert Lynd