Finally getting back to this category!! I had put it off for so long that the more time went by, the more I dreaded what I'd face. But, this being Mother's Day, Hubby cooked dinner and son cleaned up, so I decided I'd put the gift of time to good use.

I just wanted to thank you, Faldage, for posting this; I always like learning things effortlessly:
In more general terms, it refers to the mechanism in some languages (often called inflected languages) or indicating grammatical categories by added affixes (pre-, in-, or suf-) to a word. In Latin this is notable in the case system where a root of a noun will have a suffix that indicates case and number, e.g.:


Code:
Singular Plural
Nominative amicus amici
Genitive amici amicorum
Dative amico amicis
Accusative amicum amicos
Ablative amico amicis
Vocative amice amici



Verbs are similarly inflected for person, tense, aspect, mood, and other features.

In English the only remnants of this system are, in nouns, the -s of the regular plural, the -'s or -s' of the possesive, and, in verbs, the -ed of the regular past tense and the -s of the third person singular.