Where does “sanatorium” come from?

sanatorium (Latin) comes from Latin sanatus, from Latin sānō, from Latin -ō, from Proto-Indo-European -ō — Derives nouns from roots.

Ancestry of “sanatorium”, step by step

StepLanguageWordMeaning
1Latinsanatushealed, cured; restored, repaired, corrected
2Latinsānōto heal, cure
3Latin-ōsuffixed to nouns or adjectives. Originally a-stem nouns. Later extended to nouns with other stems. Forms regular first-conjugation verbs
4Proto-Indo-European-ōDerives nouns from roots
Every word from Proto-Indo-European -ō →Every word from Latin -ō →Every word from Latin sānō →