1
Stage 1 of 3
sakna
Proto-Finnic · ancient
"bathhouse, hearth"
an ancient word for a heated pit-house or bathhouse
2
Stage 2 of 3
sauna
Finnish · medieval
"steam bathhouse"
central to Finnish bathing and social custom for centuries
3
Stage 3 of 3
sauna
English · 1880s
"a steam bathhouse"
adopted unchanged as travelers described the Finnish custom
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