Decrease and Countersink

noun

• A change downward.
  • usage: "there was a decrease in his temperature as the fever subsided"; "there was a sharp drop-off in sales"
  • synonyms: lessening, drop-off
• A process of becoming smaller or shorter.
  • synonyms: decrement
• The amount by which something decreases.
  • synonyms: decrement
• The act of decreasing or reducing something.
  • synonyms: diminution, reduction, step-down

verb

• Decrease in size, extent, or range.
  • usage: "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper"
  • synonyms: diminish, lessen, fall
• Make smaller.
  • usage: "He decreased his staff"
  • synonyms: lessen, minify

• (v.t.) To cause to grow less; to diminish gradually; as, extravagance decreases one's means.
• (v.) A becoming less; gradual diminution; decay; as, a decrease of revenue or of strength.
• (n.) To grow less, -- opposed to increase; to be diminished gradually, in size, degree, number, duration, etc. or in strength, quality or excellence; as, they days decrease in length from June to December.
• (v.) The wane of the moon.

noun

• A hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface.
• A bit for enlarging the upper part of a hole.
  • synonyms: counterbore, countersink bit

verb

• Insert (a nail or screw below the surface, as into a countersink. ).
  • synonyms: set

• (n.) A drill or cutting tool for countersinking holes.
• (n.) An enlargement of the upper part of a hole, forming a cavity or depression for receiving the head of a screw or bolt.
• (v.t.) To chamfer or form a depression around the top of (a hole in wood, metal, etc.) for the reception of the head of a screw or bolt below the surface, either wholly or in part; as, to countersink a hole for a screw.
• (v.t.) To cause to sink even with or below the surface; as, to countersink a screw or bolt into woodwork.