Why is "and" not used before ", etc."? [closed]

Solution 1:

As @Deadrat and Hotlicks mentioned in the comment, in Latin, "et" is a conjunction which means "and" and "cetera" is an adverb which means "others" or "the rest".

Therefore, if you write "and et cetera (etc.)", you are writing "and and others" which is not correct. That's why you should not use "and" before "etc."