It's not really about the meaning; it's about singulating a plural word usually (I actually think always) ending in "ia":
examples: bacteria (plural) bacterium (singular), media (plural) medium (singular).
A person involved with or connected to the belief or activity of the root word. For example, a socialite is a person actively involved in social activities within the community.
The word meaning "make use of" contains the suffix -ize.
what is the suffix of decomposer and what does it mean
Possibly or probably
suffix means ;the added word or phrase to another word . here is an example; read reread re is the suffix of the word read
The suffix -dermis mean of or relating to the skin. It comes from the Greek word for skin, which is dermis.
'Unfaithful' contains both a prefix and a suffix: UN-faith-FUL.
The word meaning "make use of" contains the suffix -ize.
The word "wishful" contains the suffix - ful. There is no prefix.
that a suffix is at the last of he word
It is the prefix hyper- attached to the word "active" which contains the suffix -ive.
-Mi
what is the suffix of decomposer and what does it mean
Possibly or probably
There isn't one, because it contains no prefix or suffix.
Unaware is a word. It contains the prefix un-, meaning not. But, unaware itself is not a prefix or suffix.
Assuming you mean "competitor" the answer is no. The suffix is -or.
suffix means ;the added word or phrase to another word . here is an example; read reread re is the suffix of the word read