If, by add you mean concatenate, the answer is Yes.
For example, a semihemidemisemiquaver (1/128 of a quaver).
Some prefixes you can add to the word "Caution" are "pre-" (precaution), "mis-" (miscaution), and "re-" (recaution).
Dex is not a word.
distrusted mistrusted
Un- and re- are two prefixes for "do."
Prefixes and suffixes in like a name like a person
No, you cannot add prefixes to polyatomic ions. Polyatomic ions are groups of bonded atoms that carry a charge and have specific names that are used in chemical nomenclature. These names do not require prefixes to indicate the number of atoms present.
af, un
hymnal
surface
Prefixes for code:decoderecode
You could make reasonable reasonably.
Two prefixes that mean "cut" or "cut out" are "dis-" and "ab-".