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ith clay, earth, dry sand, sod, or other material, as a hole bored in a rock, in order to prevent the force of the explosion from being misdirected.

r may flow freely when the tide sets in one direction, but which closes automatically and prevents the water from flowing in the other direction. (b) (Naut.) A place where the tide runs with great velocity, as through a gate. -- Tide gauge, a gauge for showing the height of the tide; especially, a contrivance for regi…

An equality in numbers, as of votes, scores, etc., which prevents either party from being victorious; equality in any contest, as a race.

A beam acting as a tie, as at the bottom of a pair of principal rafters, to prevent them from thrusting out the wall. See Illust. of Timbers, under Roof. Gwilt.

le joint. Toggle iron, a harpoon with a pivoted crosspiece in a mortise near the point to prevent it from being drawn out when a whale, shark, or other animal, is harpooned. -- Toggle joint, an elbow or knee joint, consisting of two bars so connected that they may be brought quite or nearly into a straight line, and m…

e, or to be done, without prohibition or hindrance; to allow or permit negatively, by not preventing; not to restrain; to put up with; as, to tolerate doubtful practices. Crying should not be tolerated in children. Locke. We tolerate them because property and liberty, to a degree, require that toleration. Burke.…

A chain for slinging the lower yards, in time of action, to prevent their falling, if the ropes by which they are hung are shot away.

without overhang, flattened on the bottom, used in some torpedo and fast power boats. It prevents settling in the water at high speed.

n a drain, soil pipe, sewer, etc., arranged so that the liquid contents form a seal which prevents passage of air or gas, but permits the flow of liquids.

A stone, block of wood, or anything else, placed under a wheel or barrel to prevent motion; a scotch; a skid. [Eng.] Wright.

A line of fortifications, usually rough, constructed to prevent the passage of an enemy across a region. [Sp. Amer.]

A revolving frame in a footpath, preventing the passage of horses or cattle, but admitting that of persons; a turnpike. See Turnpike, n., 1.

Not avoidable; incapable of being shunned or prevented; inevitable; necessary; as, unavoidable troubles.

To prevent from being a fellow or companion; to separate from one's fellows; to dissever. Death quite unfellows us. Mrs. Browning.

The act, art, or practice of vaccinating, or inoculating with the cowpox, in order to prevent or mitigate an attack of smallpox. Cf. Inoculation.

the ends curved and pointed, used on toe or quarter cracks to bind the edges together and prevent motion. It is clasped into two notches, one on each side of the crack, burned into the wall with a cautery iron.

it air to a vessel in which the pressure is less than that of the atmosphere, in order to prevent collapse. -- Torricellian vacuum. See under Torricellian.

d falling, sliding, turning, or the like, it will open or close the aperture to permit or prevent passage, as of a fluid.

vapor from molten zinc in a separate receptacle, using hydrogen or other reducing gas to prevent oxidation.

Tending to prevent, destroy, or expel, worms or vermin; anthelmintic.