Fruitless
Fruitless , adjective
1.
Lacking, or not bearing, fruit; barren; destitute of offspring; as, a fruitless tree or shrub; a fruitless marriage. — Shakespeare
2.
Productive of no advantage or good effect; vain; idle; useless; unprofitable; as, a fruitless attempt; a fruitless controversy.
They in mutual accusation spent
The fruitless hours.