Prefix help! etmology for "bonus"?

Question

In bonus.....
bon- is the prefix which means good
us- is this the root or the suffix? what does it mean?

Answer 1

Definitions
bonus
an unexpected extra benefit gained or given with something else.

http://www.m-w.com/dictionary/bonus
Main Entry: bo·nus
Pronunciation: 'bO-n&s
Function: noun
Etymology: Latin, literally, good -- more at BOUNTY
: something in addition to what is expected or strictly due: as a : money or an equivalent given in addition to an employee's usual compensation
THE ......"US" .....IS THE SUFFIX
suffix
(definition)

Definition: The end characters of a string. More formally a string v is a suffix of a string u if u=u'v for some string u'.

Answer 2

Actually... Bonus comes from the Latin word for good. which is "bonus, -a, -um" The "us", in Latin, is the ending that shows that a word is male. The -a means that bonus can be written bona when reffering to a girl. The-um means that it is neuter like the elements. This is similar to Spanish senor and senorita two different ways to say something depending on the gender of the thing.

So the "us" is the ending and "bon" is the word




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