strengthen

To make strong or increase the strength of.

To become strong or stronger.

To make strong or stronger; add strength to, either physical, legal, or moral; confirm; establish: as, to strengthen a limb; to strengthen an obligation; to strengthen a claim; to strengthen authority.

Synonyms To invigorate, fortify, brace, nerve, steel, corroborate, support, heighten.

To grow strong or stronger.

To grow strong or stronger.

To make strong or stronger; to add strength to.

To animate; to encourage; to fix in resolution.

To make strong or stronger; to add strength to; to increase the strength of; to fortify; to reinforce.

To animate; to give moral strength to; to encourage; to fix in resolution; to hearten.