Today's Word of the Day means...
[1900+ Students; like zilch, probably coined from a familiar word beginning with z]
[1900+; echoic of the sound of something swishing rapidly through the air, giving an impression of force, and also of the tearing of cloth; such a use is attested fr 1875]
To set something on fire; ignite something
[1970s+ Army; fr Zippo, trademark of a cigarette lighter, probably fr the sound made as one turns the sparking wheel, and the speed with which the lighter ignites]