H7475–רַעְיוֹן–ra.yon

And I applied my heart to know wisdom, and to know madness and folly--I perceived that this also was a striving after wind.

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

For what hath a man of all his labour, and of the striving of his heart, wherein he laboureth under the sun?

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

There was no end of all the people, even of all them whom he did lead; yet they that come after shall not rejoice in him. Surely this also is vanity and a striving after wind.

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