overextend - definition and synonyms

verb [transitive] 

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/ˌəʊvərɪkˈstend/
present tense
I/you/we/theyoverextend
he/she/itoverextends
present participleoverextending
past tenseoverextended
past participleoverextended
  1. to use more of something than is reasonable or sensible

    overextend your finances