Answer: intercepting

AnswerCrossword Clue
intercepting(of a line or surface) Mark or cut off (part of a space, line, or surface)
interceptingCut off or deflect (light or other electromagnetic radiation)
interceptingObstruct (someone or something) so as to prevent them from continuing to a destination
interceptingINTERCEPT, to stop and seize on the way from one place to another