Submitted by György Chityil ... on Fri, 01/19/2018 - 16:50 Hierarchy: VerbDescription: {{rfv-sense}} {{transitive}} To explore a drain or other tunnel systemNgram: drainNgram Text: drainSource: WiktionaryIssue: 0Wiktionary tag: rfv-senseNgram Count: 1Wikokit WikiText ID: 551515