>>>No way (ergo, unreachable :). If you're understanding a tree, you're in danger of it falling on you; if you're overlying it, you have already fallen on it, not the other way around.
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>>But I thought in grammar that a double negative makes a positive. So if 'under' and 'over' are opposites and 'standing' and 'lying' (regardless of the truth) are opposites, then taken as one, they should end up meaning the same thing. Are you saying that my logic is peccable?
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>In the UK, to "overtake" a car is to "pass" it. If you overtake on the nearside then this is colloquially known as "undertaking". And it's an easy way to end up in the care of "undertakers" (morticians).

On a related note... "podvodač" (underguide, or rather, sub-leader) is the official term for a pimp in Serbian et al.