You could make reasonable reasonably.
Dex is not a word.
Some prefixes you can add to the word "Caution" are "pre-" (precaution), "mis-" (miscaution), and "re-" (recaution).
af, un
hymnal
a prefixes is a group of letters that are fixed to the front of the root word. A suffixes is the main word for example dislike. dis is the prefixes and like is the suffixes
Prefixes and suffixes in like a name like a person
No, the additional prefixes are redundant and add nothing to the meaning.
pre-
Di-spelled Mis-spelled Re-spelled
Pre
"Patients" doesn't have a prefix. You could add the prefix in- to it to get the word inpatients.
Reason is a word by itself and cannot be broken down to word + suffix. The suffix -able can be added to it to form the word 'reasonable'.