Strength·en v. t. [imp. & p. p. Strengthened p. pr. & vb. n. Strengthening.]
1. To make strong or stronger; to add strength to; as, to strengthen a limb, a bridge, an army; to strengthen an obligation; to strengthen authority.
Let noble Warwick, Cobham, and the rest, . . .
With powerful policy strengthen themselves. --Shak.
2. To animate; to encourage; to fix in resolution.
Charge Joshua, and encourage him, and strengthen him. --Deut. iii. 28.
Syn: -- To invigorate; confirm; establish; fortify; animate; encourage.
Strength·en·ing, a. That strengthens; giving or increasing strength. -- Strength*en*ing*ly, adv.
Strengthening plaster Med., a plaster containing iron, and supposed to have tonic effects.
adj : invigorating physically or mentally [syn: fortifying]
n 1: becoming stronger [ant: weakening]
2: the act of increasing the strength of something [ant: weakening]