STUDY n.
A setting of the mind or thoughts upon a subject; hence, application of mind to books, arts, or science, or to any subject, for the purpose of acquiring knowledge. Hammond . . . spent thirteen hours of the day in study. Bp. Fell. Study gives strength to the mind; conversation, grace. Sir W. Temple.
TORPEDO n.
g, operating, or otherwise making use of, torpedoes against an enemy's ship. -- Torpedo nettings, nettings made of chains or bars, which can be suspended around a vessel and allowed to sink beneath the surface of the water, as a protection against torpedoes.