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How I [understand](http://jgram.org/pages/viewOne.php?tagE=should#part4) it,
`～べく`, meaning `"for the purpose of..." / "In order to...."`, is the
conjunctive form of `～べき`, which indicates something that should be done.

>   * たくさん本を読む **べき** (you should read many books)
>
>   * エンジニアになる **べく** 一生懸命勉強した (I studied hard in order to become an engineer)
>
>

In the following [example
sentence](http://tangorin.com/examples/%E3%81%B9%E3%81%8F%E3%81%97%E3%81%A6),
is the `べくして` related grammatically or semantically to `～べき` or `～べく`?

> 起こる **べくして** 起こった事故だった。 It was an accident waiting to happen.
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2012-09-03T02:28:24.713
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2012-09-03T04:01:35.533
2012-09-03T02:43:51.980
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question
grammar
Is 「～べくして」 related to 「～べき」 / 「～べく」?
Rikaichan writes `べくして` as `可くして` and translates it as

> (uk) as it is bound to (happen)/following the natural course
>
> (uk) though possible as it may be

which is derived from `べく` / `～べき`, which are written as `可く` / `～可き`,
respectively.
CC BY-SA 3.0
2012-09-03T03:23:18.187
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2012-09-03T04:01:35.533
2020-06-17T08:18:27.500
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answer