"Per-" is a word in ENGLISH

A prefix used to signify through, throughout, by, for, or as an
intensive as perhaps, by hap or chance; perennial, that lasts
throughout the year; perforce, through or by force; perfoliate,
perforate; perspicuous, evident throughout or very evident; perplex,
literally, to entangle very much.

Originally, denoting that the element to the name of which it
is prefixed in the respective compounds exercised its highest valence;
now, only that the element has a higher valence than in other similar
compounds; thus, barium peroxide is the highest oxide of barium; while
nitrogen and manganese peroxides, so-called, are not the highest oxides
of those elements.

Through; by means of; through the agency of; by; for; for
each; as, per annum; per capita, by heads, or according to individuals;
per curiam, by the court; per se, by itself, of itself. Per is also
sometimes used with English words.