- Beef up - Build up - Fortify - Make firmer - Make stronger - Reinforce something - 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.
- Increase the force - Increase the force of - Make stronger - Make worse - To render more intense; as, to intensify heat or
cold; to intensify colors; to intensify a photographic negative; to
intensify animosity. - To become intense, or more intense; to act with
increasing power or energy.