The word 偷闲 is formed by combining the character 偷, meaning 'to steal' or 'to sneak,' with 闲, meaning 'leisure' or 'idleness.' Together, they create a compound where 偷 acts as a verb indicating the action of taking, and 闲 serves as the object, representing what is taken, thus literally meaning 'to steal leisure' to convey snatching a moment of free time from busyness.