As an intensifier; i.e. thoroughly, excessively; completely; utterly.
About, regarding, concerning, over.
By, near, next to, around, close to.
On, upon, at, to, in contact with something.
Forming verbs derived from nouns or adjectives, usually with the sense of "to make, become, or cause to be".
Around; about.
Off, away, over, across
All around; about; abundantly; all over.
In adjectives and adverbs: denoting the sense "extremely", as in perfervid.
In verbs: denoting the sense "through", as in perforate.
In verbs: denoting the sense "to destruction", as in pervert.
Forming nouns and adjectives denoting the maximum proportion of one element in a compound, as in peroxide.
Denoting the sense "by" or "per", as in perchance or perhaps.
Added to the name of an element in a polyatomic ion to denote the number of atoms of that element (usually four).
In verbs: denoting the sense "thoroughly", as in perfect.