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KEY: Instructor, [See INSTRUCT].
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KEY: Instrument.
SYN: Implement, utensil, tool, document, deed, record, medium, muniment, means, channel, machine, agent.
ANT: Misapplication, counteraction, counteragent, neutralizer, opponent, bar, obstruction, preventive, stop.
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KEY: Instrumentality.
SYN: Agency, intervention, medium, use, employment, means.
ANT: Nonintervention, spontaneity, efficacy, virtue, property, quality, force, counteragency, neutralization.