aussi
also
too
as well
as (in comparisons)
as ... as
equally
C'est aussi simple que ça.
It's as simple as that.
therefore
consequently
so (used as a discourse connector, chiefly in formal/written French)
Notes
GENERAL INFO
Aussi is an adverb. It primarily means "also," "too," or "as well." In comparisons, it means "as" (e.g., as...as). It can also mean "therefore" or "so."
USAGE
Use it to add information: "Je viens aussi." (I'm coming too.)
For comparisons: "Elle est aussi grande que lui." (She is as tall as him.)
To indicate a consequence: "Il pleut, aussi nous restons à la maison." (It's raining, so we're staying home.)
TRAPS
For negative sentences meaning "me neither" or "not...either," use "non plus." "Je ne viens pas non plus." (I'm not coming either.) "Aussi" is for positive additions.
