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KEY: Aged.
SYN: Old, ancient, antiquated, elderly, senile, patriarchal, primeval, time-honored, olden.
ANT: Juvenile, youthful, young, upstart, recent, fresh.
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KEY: Agency, [See AGENT].
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KEY: Agent.
SYN: Doer, performer, actor, force, means, instrument, influence, cause, promoter, operator.
ANT: Counteragent, counteractor, counteraction, opponent, neutralizer.