activity

by the agency of; through (instrumentality); by means of.

laboriously; lustily; pugnis et calcibus; with might and main, with all one's might, with a strong hand, with a sledge hammer, with much ado; to the best of one's abilities, totis viribus, vi et armis, manibus pedibusque, tooth and nail, unguibus et rostro, hammer and tongs, heart and soul; through thick and thin (perseverance)., by the sweat of one's brow, suo Marte.

heart and soul, from the bottom of one's heart, ab imo pectore, at heart, con amore, heartily, devoutly, over head and ears.

vivendi causa.

in pursuance of (intention); after.

in glowing terms, in good set terms, in no measured terms.

till one is black in the face.