: less than optimal: not at the best possible level
suboptimal performance
suboptimal conditions/results/solutions
received suboptimal care
… such is life at the sharp end of evolution, where the pursuit of self-interest frequently leads to suboptimal outcomes for all concerned.The Economist
Training at sub-optimal levels fatigues you and wastes time you could have spent at the high levels you hope to achieve. Rick Crawford
suboptimallyadverb
or sub-optimally
… countless companies perform suboptimally. They fail to capitalize on a unique competitive advantage. Erik Matson