sweeten Get Printable Handwriting (sweet-en) 2 syllables Learn It! Spelling Test Definition verb. to make sweet as by adding sugar; to make mild or kind; soften; to make superficially more acceptable or appealing. Example Sentence Isaac likes to sweeten his tea. OR He will sweeten her mood. Synonyms candy; dulcify; sugar coat; soften; calm; soothe Antonyms sour; acidify Share with your friends: