per-

1. 1.

   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.

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