per-
In verbs: denoting the sense "thoroughly".
In verbs: denoting the sense "to destruction".
In adjectives and adverbs: denoting the sense "extremely".
(chemistry) Forming nouns and adjectives denoting the maximum proportion of one element in a compound, as in peroxide.
(chemistry) Added to the name of an element in a polyatomic ion to denote the number of atoms of that element (usually four).
Denoting the sense "by" or "per".
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