Submitted by György Chityil ... on Fri, 01/19/2018 - 18:41 Hierarchy: VerbDescription: {{context|followed by|_|{{term|on}} or {{term|upon}}}} To encounter by chance.Ngram: happenNgram Text: happenSource: WiktionaryIssue: 0Wiktionary tag: ontermuponNgram Count: 1