apace

[ uh-peys ]

/ əˈpeɪs /

with speed; quickly; swiftly.

Origin of apace

1275–1325; Middle English a pas(e) at a (good) pace. See a-¹, pace¹

ap, ap star, ap-, ap., apa, apace, apache, apache dance, apache plume, apachean, apaches

And so, while he was celebrating the death of another with immoderate joviality, he forced on his own apace.

The Danish History, Books I-IX |Saxo Grammaticus ("Saxo the Learned")
The lion also came on apace, and Mr. Great-heart addressed himself to give him battle.

The Pilgrim's Progress by John Bunyan |John Bunyan
Dawn came on apace, heralded by the singing of birds, and the splashing of fish in search of the early insect.

Canoe Boys and Campfires |William Murray Graydon
The strange ship was only a bow shot from us, if a long one yet, but she was overhauling us apace.

A Prince of Cornwall |Charles W. Whistler

The moon of May in that valley is the moon of roses, for the heats once due come on apace.

The Desert and The Sown |Mary Hallock Foote

apace

/ (əˈpeɪs) /

quickly; rapidly

C14: probably from Old French à pas, at a (good) pace