Submitted by György Chityil ... on Sat, 01/20/2018 - 01:24 Hierarchy: NounDescription: {{geology}} A fast flowing river characterized by a deep, narrow erosion pattern forming a V shaped channel or valley.Ngram: youthful riverNgram Text: youthful riverSource: WiktionaryIssue: 0Wiktionary tag: geologyNgram Count: 2