To engage in attrition; to quit or drop out.
To be reduced in quantity through attrition.
To lose, or to kill, troops by attrition due to sustained firepower.
To wear down through attrition, especially mechanical attrition.
One who voluntarily or involuntarily leaves a company; a termed employee.
To feel sorry about (any thing).
To feel sorry about (a thing that has or has not happened), afterthink: to wish that a thing had not happened, that something else had happened instead.
Emotional pain on account of something done or experienced in the past, with a wish that it had been different; a looking back with dissatisfaction or with longing.
The amount of avoidable loss that results from choosing the wrong action.