Strengthen - Definition
strengthen
v 1: make strong or stronger; "This exercise will strengthen
your upper body"; "strengthen the relations between the two
countries" [syn: strengthen, beef up, fortify] [ant:
weaken]
2: gain strength; "His body strengthened" [ant: weaken]
3: give a healthy elasticity to; "Let's tone our muscles" [syn:
tone, tone up, strengthen]