駄 bad quality

Your horse is too fat!! It's bad quality. So is your DAD!

no way! ★★★☆☆ KUNKUNKANA
駄 (bad quality) + 目 (eye) = 駄目 (no way!)

this has so many meanings: useless, bad, 'stop!' or just 'no way!'

waste ★★☆☆☆ 1/2 KANA
無 (without) + 駄 (bad quality) = 無駄 (waste )

a waste of something (time, money)