شَدَّةٌ

[verbal noun of un. of شَدَّهُ: as such signifying] A single act [of making, or rendering, hard, firm, compact, or sound; strong, powerful, or forcible: and] of binding, or tying, firmly, fast, or strongly. (Msb.)

See also 2, last sentence but one.

-A2- Also [verbal noun of un. of the intrans. verb شَدَّ: as such signifying] A single charge or assault or attack in war or battle. (S, A, * Mgh, L, K. *)