intercut

verb

1. (transitive)To intersect.
2. To alternate between scenes from one sequence and scenes from another film sequence, often with the sequences to be perceived as simultaneous.

   “The film's plot revolves around Robert Adams […] whose older lover […] is in prison. He knows that he cannot send the love letters he wants to, so he writes and keeps them in a journal. Most of the film features voice-overs of his writing intercut with the memories of their life together.”

noun

1. An alternating sequence of this kind.

   “Smith's execution of the gangster who busted his car is the closest to some of the violence of Hill's early films, including a Peckinpahesque use of intercut slow-motion to track the gangster's harness-aided trip down the stairs to the dusty street.”