How to choose a reading for 降る? ふる & くだる


I always read 降る as ふる but for a particular sentence I noticed that the
reading was written as くだる. Are there any tips to help figure out which
reading to use?

~~Examples:  

> たとえ雨が降ろうとサイクリングにいくぞ。  
>  I will go cycling even if it rains. [M]  
>  
>  目が覚めてみると、雪が降っていた。  
>  I awoke to find it snowing.

I'm not sure if this is user-error. When I click on listen, the woman reads it
using ふる, but the software wants me to use くだる. Maybe I should change the
question to ask what I should say in my bug report? ☺~~




広辞苑 lists both 【下】and【降】in the entry for 【くだる】. It says that【降】is often used
when くだる means "going/coming down from a high place to a lower place all at
once (as opposed to a gradual descent)" or when it means like "surrendering to
an enemy" (降参).

Since the former definition is quite a common occurrence, you might see the
【降】 in written and/or a more 改まった context.

Here is a Bible verse demonstrating the former. As I posted in the comment to
the OP, I was a little concerned about posting this, but feel it is directly
grammatically related to the question.

> 「イエスは洗礼を受けると、すぐ水の中から上がられた。そのとき、天がイエスに向かって開いた。イエスは、神の霊が鳩【はと】のように御自分の上に
> **降って** 来るのを御覧になった。」 マタイによる福音書 3:16




広辞苑 lists both 【下】and【降】in the entry for 【くだる】. It says that【降】is often used
when くだる means "going/coming down from a high place to a lower place all at
once (as opposed to a gradual descent)" or when it means like "surrendering to
an enemy" (降参).

Since the former definition is quite a common occurrence, you might see the
【降】 in written and/or a more 改まった context.

Here is a Bible verse demonstrating the former. As I posted in the comment to
the OP, I was a little concerned about posting this, but feel it is directly
grammatically related to the question.

> 「イエスは洗礼を受けると、すぐ水の中から上がられた。そのとき、天がイエスに向かって開いた。イエスは、神の霊が鳩【はと】のように御自分の上に
> **降って** 来るのを御覧になった。」 マタイによる福音書 3:16

