降る

1. godan verb, intransitive to fall (of rain, snow, ash, etc.); to come down
2. to form (of frost)
3. to beam down (of sunlight or moonlight); to pour in
4. to visit (of luck, misfortune, etc.); to come; to arrive

くだる also 下る

1. godan verb, intransitive to descend; to go down; to come down
2. to be handed down (of an order, judgment, etc.)
3. to pass (of time)
4. to surrender; to capitulate
5. often in neg. form to be less than; to be inferior to
6. also written as 瀉る to have the runs; to have diarrhea
7. to pass (in stool); to be discharged from the body
8. archaic to depreciate oneself; to be humble