strengthened

(verb) make strong or stronger. Synonyms: strengthen, beef up, fortify. Examples: "This exercise will strengthen your upper body." "Strengthen the relations between the two countries."

(verb) gain strength. Synonyms: strengthen. Example: "His body strengthened."

(verb) give a healthy elasticity to. Synonyms: tone, tone up, strengthen. Example: "Let's tone our muscles."

(adj) given added strength or support. Synonyms: reinforced. Example: "Reinforced concrete contains steel bars or metal netting."