harden verb Stress: first syllable 🤍 Save Syllables: har-den (2) English Definition To become or make something hard or solid Example Sentence The clay begins to harden as it dries. US IPA /ˈhɑːrdn/ 🔊 Listen US UK IPA /ˈhɑːdn/ 🔊 Listen UK Synonyms solidify toughen stiffen crystallize Antonyms soften melt liquefy Share this Word Facebook WhatsApp X Telegram Copy Link