adv. [f. prec. + -LY2.] In an agonizing manner; with painful or desperate struggles.

1

c. 1841.  Kingsley, Lett. & Mem., I. 52. Struggles … which made him feel more agonizingly weak than ever.

2

1860.  Ruskin, Mod. Painters, V. VI. vii. § 7. They … fail egregiously;—ridiculously;—it may be, agonizingly.

3