Submitted by György Chityil ... on Fri, 01/19/2018 - 23:17 Hierarchy: PrefixDescription: {{context|non-productive}} In adjectives and adverbs: denoting the sense "extremely", as in '''perfervid'''.Ngram: per-Ngram Text: per-Source: WiktionaryIssue: 0Wiktionary tag: non-productiveNgram Count: 1