Submitted by György Chityil ... on Sat, 01/20/2018 - 00:52 Hierarchy: AdjectiveDescription: {{form of|Attributive form|safety valve|nodot=1}}, ''noun''.Ngram: safety-valveNgram Text: safety-valveSource: WiktionaryIssue: 0Wiktionary tag: form ofAttributive formnodot=1Ngram Count: 1