Japanese saying ~3~ えe

I introduce the Japanese saying that begins from え(e)
That is...えんのしたのちからもち Ennoshita no chikara mochi

Ennoshita means, "under the floor of house"
Chikara mochi means, the person who have a lot of power.
This saying means, there is a person who dedicates to something
although he or she is not known by people.
  As you know, you can't see under the area of the floor.
Actually, I sometimes hear someone say this phrase in my daily life.
So, I think this phrase is not death word.

Thanks for reading!

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