I found this sentence in a book:

> 「当時のわしは、人間が憎かったんじゃ。多くの仲間たちが、ドワーフというだけで虐げられ、人間のせいで故郷を追われたのに、生きるために人間に
> **ヘイコラ** せねばならん。その『憎しみ』が、わしの目を曇らせたんじゃ」

The character is speaking about a test he took in the past, were he failed
because he assumed the best sword could have been made by a human, since
dwarves were (at least in his eyes) better blacksmiths.

I understand most of the sentence, but I cannot understand ヘイコラ; I tried to
parse it in any way I could think of, but I found no useful words or meaning.

As far as I understand, the character is saying "At the time I hated humans.
Many fellow dwarves were oppressed just because they were dwarves and were
driven off their land by humans", then something about humans and "in order to
live" (生きるために), then "That hate clouded my eyes". But I have no idea about the
ヘイコラ part
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question
words
Meaning of ヘイコラ
Thanks to a comment from Darius Jahandarie I found it's a word not listed on
bilingual dictionaries, but it can be found for example
[here](https://www.weblio.jp/content/%E3%81%B8%E3%81%84%E3%81%93%E3%82%89):

> 相手の機嫌をとろうとして、やたらに頭を下げたり言いなりになったりするさま。「上役に—する」

In the comments, naruto quotes a definition from 明鏡国語辞典, which confirms this
is it:

> へつらって、ぺこぺこ頭をさげるさま。「上役にへいこらする」
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answer