Et cetera. Et is just "and" in Latin. Cetera means "all the rest". Et cetera = and so on, and so forth.
We see it abbreviated all the time as etc. Sometimes we see it as ect. from people who probably say "eck setra" (and aks, but that's a story for another day).
One thing I like about et cetera is that in old books, they used the & symbol in it. (& is a handwriting abbreviation for and, is pronounced and read as "and"; the symbol name is the ampersand.) At the time, & was a really common symbol. Like, little kids learned it when they learned how to read, that's how essential it was: ABC, X, Y, Z, and &. The abbreviation for et cetera was &c.
We use etc. in lists, all the time. Example: I love Mexican food like tacos, burritos, enchiladas, empanadas, etc. It's always last in a list that isn't exhaustive. You can't list your siblings in a list, there's a finite number of siblings and you know the name of every one. I love my siblings: Kim, Kourtney, Kendall, etc. For one, that's just rude to the unlisted sibs. Secondly, etc. always implies the list could grow when new information is remembered. So my advice is use etc. with lists when the list is long and boring, and especially if it's infinite, but do NOT use in lists that are finite (have an ending).
