King James Bible
King James Version (KJV)

Probably from ra'ah; a feeding upon, i.e. Grasping after -- vexation.
see HEBREW ra'ah
H7469. reuth
II. רְעוּת noun feminine longing, striving; — construct, וּר ׳הֶבֶל רוּחַ Ecclesiastes 1:14; 2:11, 17, 26; 4:4; 6:9; וּר ׳עָמָל רוּחַ 4:6.