waste of effort(n = noun.act) waste of energy - a useless effort;
is a kind of dissipation, waste, wastefulness

alkali waste, body waste, effort, food waste, fund-raising effort, high-level radioactive waste, human waste, joint effort, lay waste, lay waste to, laying waste, least effort, low-level radioactive waste, permissive waste, radioactive waste, toxic industrial waste, toxic waste, toxic waste area, toxic waste dump, toxic waste site, waste, waste away, waste basket, waste material, waste matter, waste of energy, waste of material, waste of money, waste of time, waste one's time, waste paper, waste pipe, waste product, waste time