H7475–רַעְיוֹן–ra.yon

And I gave my heart to know wisdom, and to know madness and folly: I perceived that this also is vexation of spirit.

רַעְי֥וֹן ra'.Yon “[is] a striving of”

For what hath man of all his labour, and of the vexation of his heart, wherein he hath laboured under the sun?

וּבְרַעְי֖וֹן (רַעְי֖וֹן) ra'.Yon “[the] striving of”

There is no end of all the people, even of all that have been before them: they also that come after shall not rejoice in him. Surely this also is vanity and vexation of spirit.

וְרַעְי֥וֹן (רַעְי֥וֹן) ra'.Yon “a striving of”