市肆 is read as しし (shishi) and means store.
しし
shishi
しりつ
municipal
しちゅう
in the city
しない
いちば
(town) market
しじょう
(street) market
しちょう
mayor
しみん
bourgeoisie
しがい
urban areas
しやくしょ
municipal office
しはん
putting on the market
outside the city
しせい
the street