intermitter

/ˌɪntərˈmɪtər/
noun
  1. A person or thing that stops and starts at intervals; something that causes interruption or pauses.
    • The machine's design as an intermitter allowed it to pulse water in short bursts.
    • As an intermitter in conversations, he would suddenly stop talking and then resume minutes later.
    • The old projector was a notorious intermitter, flickering on and off during the film.
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