The loss of participants during an experiment.
A gradual, natural reduction in membership or personnel, as through retirement, resignation, or death.
Grinding down or wearing away by friction.
Imperfect contrition or remorse.
The gradual reduction in a tangible or intangible resource due to causes that are passive and do not involve productive use of the resource.
The wearing of teeth due to their grinding.
The loss of a first or second language or a portion of that language.
To reduce the number of (jobs or workers) by not hiring new employees to fill positions that become vacant (often with out).
To undergo a reduction in number.
To grind or wear down through friction.
The amount of avoidable loss that results from choosing the wrong action.
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.
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.
To feel sorry about (any thing).