rat-a-tat-tat 
(răt′ə-tăt′tăt)
(răt′ə-tăt′tăt)n.
A series of short sharp sounds, as that made by knocking on a door.
[Imitative.]
- internuncio
- interoceptive
- interoceptor
- interoffice
- interoperability
- interoperable
- interpeduncular
- interpenetrate
- interpersonal
- interpersonally
- interphase
- interphone
- interplanetary
- interplay
- interplead
- interpleader
- interpolate
- interpolation
- interpolative
- interpolator
- interposal
- interpose
- interposer
- interposition
- interpret