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  1. Oxford American Dictionary

    sap

    • IPA[sap]

    美式

    • n.
      a tunnel or trench to conceal an assailant's approach to a fortified place.
    • v.
      dig a sap or saps；make insecure by removing the foundations of

    • verb: sap, 3rd person present: saps, gerund or present participle: sapping, past tense: sapped, past participle: sapped

    • noun: sap, plural noun: saps

    • 釋義

    名詞

    • 1. a tunnel or trench to conceal an assailant's approach to a fortified place.

    動詞

    • 1. historical dig a sap or saps having sapped up to the glacis of the city ramparts, Versaillais troops entered the city
    • ▪ historical make insecure by removing the foundations of a crazy building, sapped and undermined by the rats
    • ▪ historical undercut by water or glacial action the waves sapped the cliffs a valley or channel may have been formed as a result of sapping