strengthen

• strengthen

strengthen

Verb

make strong or stronger; "This exercise will strengthen your upper body"; "strengthen the relations between the two countries"

Synonyms:

• strengthen
• beef up
• fortify

Verb

gain strength; "His body strengthened"

Synonyms:

• strengthen

Verb

give a healthy elasticity to; "Let's tone our muscles"

Synonyms:

• tone
• tone up
• strengthen