0 abbreviation for et alia: and others. It is used in formal writing to avoid a long list of names of people who have written something together:
1 abbreviation for et alii (= and other people):
2 abbreviation for et alia: and others. It is used in formal writing instead of giving a long list of names of people who have written something together:
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.