c. 1600, from Swede + -ish. Similar formation in Dutch Zweedsch, German Schwedisch. Related: Swedishness. As a language name from c. 1600. The candy Swedish fish attested by that name by 1983.
sweatshop
sweaty
Swede
Sweden
Swedenborgian
Swedish
sweep
sweeper
sweepstakes
sweet
Sweet Adeline