La salsiccia is pronounced sahl – SEECH – cheeah. It is a general term for any kind of sausage.
La salsiccia is a feminine countable noun and its plural is le salsicce. According to this online etymological dictionary, the word salsiccia is built from two Latin roots: sals-, from salsus, which means salty; and insicia, chopped up meat.
Figuratively speaking, you might here an Italian say they were going to “fare salsiccia di qualcuno” [make a sausage out of someone]. Making a sausage out of someone is metaphor for beating someone up pretty badly. This is an expression you’ll hopefully never have to hear or use.