Where does “サ高住” come from?

サ高住 (Japanese) comes from Japanese サービス, from English service, from Middle English servise, from Old English serfis, from Old French servise, from Latin servitium, from Latin -itia, from Latin -ia — Creates adjectives from noun or verb stems.

Ancestry of “サ高住”, step by step

StepLanguageWordMeaning
1Japaneseサービスservice; giving away something or doing something...
2EnglishserviceAn act of being of assistance to someone; The...
3Middle Englishserviseservice; servitude; vasselage
4Old Englishserfisservice
5Old Frenchserviseservice; servitude; vasselage; church service
6Latinservitiumslavery, servitude; slaves; service
7Latin-itia-ness, -ity
8Latin-iaUsed to form a feminine abstract noun, usually...
9Latin-iusforming adjectives from nouns; nominative neuter...
10Proto-Italic-jōsForms comparative adjectives
11Proto-Indo-European-yósCreates adjectives from noun or verb stems
Every word from Proto-Indo-European -yósEvery word from Latin -iaEvery word from Latin -ius