interlŏcūtĭo

Intercapedo and interruptio are any interruption of another person’s business; intercapedo, a quiet, often even a benevolent interruption; interruptio, a violent and turbulent interruption; whereas interpellatio and interlocutio are only the interruption of a speech by speaking between; the interpellator will nearly prevent the speaker from going on; the interlocutor will make himself also heard in the midst of another’s speech. (vi. 176.)