80251
I saw it in this tanka that I'm trying to translate:

> 偽のある世にだにもふるさとの契りわすれず雁の **ゆくらん**
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2020-08-20T08:25:37.040
80247
2021-12-10T07:35:50.907
2020-08-20T16:29:41.340
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question
grammar classical-japanese auxiliaries
What is the meaning of らん in ゆくらん?
In this sentence, ゆくらん = ゆく "go" + らん. らん is a later spelling for the
auxiliary [らむ](https://kobun.weblio.jp/content/%E3%82%89%E3%82%80). It falls
under the following definition.

> ② 〔現在の原因の推量〕…（のため）だろう。どうして…だろう。▽目の前の事態からその原因・理由となる事柄を推量する。  
>  _must be —ing because of; why should ... be —ing_? (speculating the
> cause/reason out of the present state of affairs)

**Addendum** : the translation of so-called 原因推量 usage of らむ could be tricky,
because it is used in such a construction:

> V1(-continuation)、V2らむ

to mean "V1, [which must be] why V2 now". Thus if V1 is not provided, it
becomes "why [have to (end up)] V2 now". For the latter case, a word means
"why" can be explicitly added, too.
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2020-08-20T16:10:06.660
80251
2021-12-10T07:35:50.907
2021-12-10T07:35:50.907
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answer