the.com/infirmary

means A place for treating the sick or injured, especially in a school, institution, or small-scale medical setting.

from Traces back to the Latin 'infirmus' — not firm, weak, feeble — the same root that gives us 'infirm.' That fed into Medieval Latin 'infirmaria,' the room set aside for the sick in monasteries, where monks nursed the ailing. French carried it along as 'enfermerie,' and English borrowed the word in roughly that monastic sense, keeping the smell of institutional care — stone floors, narrow beds — ever since.