Unstably

adv. [UN-¹ 11. Cf. prec.] In an unstable manner; unsteadily.

a. 1380.  Eufrosyne, 390, in Horstm., Altengl. Leg. (1878), 178. I stunte, I stonde, vnstabli I stalke.

14[?].  Wyclif’s De Ecclesia (1851), p. xiii. But her þenken trewe men þat þe fend failiþ her, & goiþ vnstably [v.r. unstable] bi two weies.

c. 1440.  Promp. Parv., 367/2. Onstabylly, instabiliter.

1502.  Atkynson, trans. De Imitatione, III. xix. 212. He standeth casually and vnstably that castith nat all his busynes in the.

1611.  Cotgr., Instablement, vnstably, vnsteadily.

1654.  Ellistone & Sparrow, trans. Boehme’s Myst. Magnum, lxxvi. 579. As Adam suddenly and unstablely therein, departed from his Glory.

1830.  Pusey, Hist. Enq., II. 109. Others, who are unstably ‘halting between the two opinions.’

1879.  Thomson & Tait, Nat. Phil., I. I. § 351. A particle placed on the inner circle … would move perpetually in that circle, but unstably.