keep

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keep

Architecture the main tower within the walls of a medieval castle or fortress

Keep

Inner tower of a castle.

keep, donjon

keep
The stronghold of a medieval castle, usually in the form of a massive tower, and a place of residence, esp. in times of siege.
References in periodicals archive ?
This keeps the generator cooler, keeps down the noise, and keeps the interior of the generator cleaner.
That keeps down moisture that can lead to corrosion damage.
"I'm trying to enjoy myself that way, it keeps down the pain for a while," he said.