hockle · noun, verb1
Probably from hackle, a brush once used for fraying flax, and related to heckle (“to tease”).
hockle · verb2
From imperfect and past participle hockled; from present participle and verbal noun hockling. From hock.
hockle · noun, verb3
Probably onomatopoeic.
Etymology from Wiktionary, CC BY-SA 4.0.