改あらたまる

1. 1to be renewed ; to change
2. 2to be improved ; to be reformed ; to be revised ; to be corrected
3. 3to stand on ceremony ; to be formal
4. 4to take a turn for the worse (of an illness) ; to take a serious turn

Other writings and readings

JMdict entry 1200730 · frequency rank 43. Source and licence.