sap1
Pronunciation: /sap/
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[ with object]
Definition of sap
noun
verb ( saps, sapping, sapped)
Origin:
Old English sæp, probably of Germanic origin. The verb (dating from the mid 18th century) is often interpreted as a figurative use of the notion ‘drain the sap from’, but is derived originally from the verb sap2, in the sense 'undermine'