vi to grow worse; to deteriorate.
2. worst ·noun that which is most bad or evil; the most severe, pernicious, calamitous, or wicked state or degree.
3. worst ·adj bad, evil, or pernicious, in the highest degree, whether in a physical or moral sense. ·see worse.
4. worst ·adj to gain advantage over, in contest or competition; to get the better of; to defeat; to overthrow; to discomfit.