- A couple or pair
- A pair
- A pair of things
- Fortify
- Overalls, bib and ...
- Pair in second-rate contest
- Pair prepare to crash
- 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.