falter - definition and synonyms

verb [intransitive] 

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present tense
present participlefaltering
past tensefaltered
past participlefaltered
  1. 2
    to stop doing something because you have lost your confidence or determination

    Wright never faltered in his architectural principles.

  2. 3
    to stop speaking, or to speak with pauses between the words, because you are nervous or upset
    1. a.
      if someone’s steps falter, they stop walking