Perpendicular and Invisible

I'm invisible, yes,
Perpendicular, too;
I'm a measure of wind,
And I slice things right through.

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Perpendicular and Invisible Solution

Solution: SHEER (SHEAR)

You can see through something which is SHEER.
A SHEER climb is a perpendicular/vertical climb.
Wind SHEAR is a measure of wind differential.
SHEARS (scissors) cut things.

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