from side to side; crosswise.
2. Nautical. a.
at right angles to the fore-and-aft line
broadside to the wind because of equal and opposite pressures of wind and tide: a ship riding athwart.
perversely; awry; wrongly.
from side to side of; across.
Nautical. across the direction or course of.
in opposition to; contrary to.
Origin: 1425–75; late Middle English;