advb. phr. [A prep.1 + SUDDEN.] Of a sudden, suddenly.

1

1875.  B. Taylor, Faust, I. iv. A-sudden stood I in a glowing sphere.

2

1880.  A. Austin, in Contemp. Rev., April, 642.

        And, asudden, witching Spring
  Into her bosom sucks the snow.

3