slip (back) மோசமாகு mōcamāku (moosamaahu) (3 intr) get worse, return to a bad state; worsen; take a turn for the worse; decline, fall off
Usage:
அவன் நிலை மோசமாகிவிட்டது avaṉ nilai mōcamākiviṭṭatu avan nele moosamaayṭṭadu His health situation has slipped (back) again.