Dictionary and Thesaurus

Definition of Strengthen

• (v. t.) 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.
• (v. t.) To animate; to encourage; to fix in resolution.
• (v. i.) To grow strong or stronger.

Synonyms of Strengthen

• Tone
• Tone Up
• Fortify
• Gird
• Build Up
• Fort
• Spike
• Arm
• Beef Up
• Lace
• Intone
• Inflect
• Modulate
• Chant
• Confirm
• Assure
• Fix
• Sanction
• Substantiate
• Corroborate
• Prove
• Settle
• Sustain
• Establish
• Ratify
• Uphold
• Change
• Alter
• Modify

Antonyms of Strengthen

• Weaken
• Abrogate
• Cancel
• Overthrow
• Condole With
• Console
• Shatter
• Upset
• Annul
• Destroy
• Shake
• Unsettle

Homophones of Strengthen