BUMBLED

Verb

bumbled

simple past tense and past participle of bumble

Source: Wiktionary

BUMBLE

Bum"ble, n. Etym: [See Bump to boom.] (Zoöl.)

Definition: The bittern. [Local, Eng.]

Bum"ble, v. i.

Definition: To make a hollow or humming noise, like that of a bumblebee; to cry as a bittern. As a bittern bumbleth in the mire. Chaucer.

Source: Webster’s Unabridged Dictionary 1913 Edition