"Faze" means to embarrass or disturb, but is almost always used in the negative sense, as in "the fact that the overhead projector bulb was burned out didn't faze her." "Phase" is a noun or verb having to do with an aspect of something. "He's just going through a temperamental phase." "They're going to phase in the new accounting procedures gradually." Unfortunately, Star Trek has confused matters by calling its ray pistols phasers. Too bad they aren't fazers instead.
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