To fish by trailing a line with a hook and bait or lure through water, traditionally for salmon or trout.
Possibly from Scottish origins, related to Old English eagel or similar root words for fishing techniques. The exact etymology is uncertain but likely connected to regional fishing vocabulary.
Egling is how ancient Scottish river keepers caught salmon for centuries—a specific quiet technique that's almost meditative, and you still see people doing it on Scottish streams today in exactly the same way.
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