sap - definition and synonyms

verb [transitive] 

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/sæp/
present tense
I/you/we/theysap
he/she/itsaps
present participlesapping
past tensesapped
past participlesapped
  1. to make someone feel weak

    Both teams were sapped by the heat.

    sap someone’s energy/strength (=make someone feel tired and weak):

    The whole incident seems to have sapped Mum’s strength.

    sap someone’s will (=make someone less certain about what they want to do):

    Sanctions have sapped the government’s will.