(to cause something) to become strong(er)
make more forceful, powerful
Cases of word usage
1) a flat, thin piece of material used to fasten things or to strengthen something (band)
2) to strengthen (a place) against attack (with walls, weapons etc) (fortify)
3) a piece of wood or metal used in a building etc to strengthen it; to walk in a proud, self-important way (strut)
