sheer

Not mixed with extraneous elements.

“sheer wine”

Very steep; having a prominent and almost vertical front.

“a sheer descent of rock”

Complete and without restriction or qualification; sometimes used informally as intensifiers.

“got the job through sheer persistence”

“sheer stupidity”

So thin as to transmit light.

“sheer silk stockings”

Turn sharply; change direction abruptly.

Cause to sheer.

“She sheered her car around the obstacle”

Straight up or down without a break.