STRENGTHENED
reinforced, strengthened
(adjective) given added strength or support; “reinforced concrete contains steel bars or metal netting”
Source: WordNet® 3.1
Verb
strengthened
simple past tense and past participle of strengthen
Source: Wiktionary
STRENGTHEN
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, v. i.
Definition: To grow strong or stronger.
The young disease, that must subdue at length, Grows with his growth,
and strengthens with his strength. Pope.
Source: Webster’s Unabridged Dictionary 1913 Edition