Exterminate is the sound a Dalek makes before it fires its Extermination Ray. So far, only two things have negated its effect: a fully-functional forcefield powered by an extrapolater; the Time And Relative Dimensions In Space, directed through Rose.

V.

1. To kill on mass
2. What a Dalek - From the science fiction show Doctor Who - crys before killing (or missing) the intended victim. Screetched in metallic tones, every sylablle distinct.

kill en masse; kill on a large scale; kill many;