advb. phr. [A prep.1 + SWIM.] Swimming, afloat.
1663. in Spalding, Troub. Chas. I. (1829), 44. The soldiers … were all a-swim through the water that came in at the holes and leaks of the ship.
1870. Morris, Earth. Par., I. I. 125. The shallow flowing sea … set the wrack a-swim.
