a-tumbleadv.
/əˈtʌmb(ə)l/ In tumbling condition, tossing.
ΘΚΠ
the world > movement > motion in specific manner > irregular movement or agitation > [adverb] > tossing, tumbling, or rolling
tumblingly1620
a-tumble1881
1881 W. C. Russell Sailor's Sweetheart II. i. 75 The sea was all a-tumble with the breeze.
This entry has not yet been fully updated (first published 1885; most recently modified version published online March 2018).
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adv.1881