Proto-Baltic: *sap-n-i-, *sap-n-a-, -ia- c., *sap-en-a-, -an-, -i- c.
Meaning: dream, sleep
Lithuanian: sãpna-s `Traum, dial. Schlaf', dial. sãpni-s, sapnī̃-s 'Traum'
Lettish: sapnis, sapinis, sapenis, sapins, sapans, sapęns, sapns (gen. -s) 'Traum'