Part of speech: Adverb
in addition
Example: he has a Mercedes, too
The word "also" comes from Old English ealswā, which comes from Middle English also. Many other languages have similar words:
as – A related word in the same word family.
all – A related word in the same word family.
so – A related word in the same word family.
The Anglo-Saxons brought Germanic vocabulary to Britain in the 5th century CE.