Picture two hands each other and twisting, with neither one willing to let go. That grip holds the whole word together. Point it at a disagreement and you get the commonest use: the same argument comes back month after month and nothing is ever settled. Point it at a field of animals that will not stay together, or a room of small children, or ten years of messy numbers, and the same effort turns outward: you grip, you pull, you keep at it until the mess is under control. The picture is a way to hold the meanings in one head, not a claim about how they grew apart.
From the word’s history
The source traces wrangle to Middle English wranglen, from a Middle Dutch or Middle Low German word for causing an uproar and struggling or wrestling, related to wringen, to twist or wring. The twisting, gripping picture matches the root the source gives.
來源記錄 wrangle 來自中古英語 wranglen，再往前是中古荷語、低地德語裡「鬧起來、纏鬥、扭打」那一支，和 wring（擰、扭）同源。所以「扭住不放」這個畫面，剛好對得上來源給的字根，不是為了好記才編出來的。
Wiktionary entry for wrangle, packet source_ref kaikki:3f6f69a190036ae4:857446100:44314
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