I've heard this term, to take dead aim at something. Does the "dead" in this expression do anything? I remember hearing the expression "I'll do my level best" and was quite sure leaving "level" out would leave the statement unchanged in meaning. Is this a similar case or not?
I'm thinking either the "dead" contributes nothing to the meaning, or possibly it functions as an intensifier, in the same way that "right" functions in "I'll go [right] for the jugular". Maybe it means in a stronger or more aggressive way?
It just seems to me that "take aim" seems to get the point across, what does the "dead" mean?