Proto-Baltic: *čil-a- c., *čil-ā̂ f.
Meaning: pine/spruce forest, heather
Lithuanian: šila-s 'Heide, Fichtenwald, Nadelholzwald'; žem. 'Heidekraut, Erica vulgaris, E. calluna'
Lettish: sils, sila 'grosser Wald, Forst, nam. Nadelholzwald; Heide', sils 'Calluna vulgaris; Feld-Thymian (Thymus serpyllum L.)'
Old Prussian: sylo 'Heide' V. 589