Etymology
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conservator (n.)

c. 1400, "an official entrusted with the power and the duty to protect the interests or rights of someone else or some thing," from Anglo-French conservatour, from Latin conservator "keeper, preserver, defender," agent noun of conservare "to keep, preserve, keep intact, guard," from assimilated form of com-, here perhaps an intensive prefix (see com-), + servare "keep watch, maintain" (from PIE root *ser- (1) "to protect").

General sense of "a preserver" (from injury, violation, etc.) is from mid-15c. Fem. form conservatrice was used mid-15c. in reference to the Virgin.

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conservatorship (n.)

"condition or office of a conservator," 1640s, from conservator + -ship.

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conservatory (n.)

1560s, "a preservative," from noun use of conservatory (adj.) "having the quality of preserving," from Latin conservator "keeper, preserver, defender," agent noun from conservare. Meaning "a place for preserving or carefully keeping anything" is from 1610s, from Latin stem of conservation + -ory. From 1660s as "greenhouse." Middle English had servatorie "fish-pond, reservoir" (late 15c.), from Medieval Latin servatorium.

The meaning "school of music, for performing arts" is recorded from 1805, from Italian conservatorio or French conservatoire, a place of public instruction and training in some branch of science or the arts, especially music, from Medieval Latin conservatorium. Originally an Italian institution, "hospital for foundlings in which musical education was given;" it was picked up by the French after the Revolution. The Italian word is attested in English from 1771.

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