A Scottish dialect word for a glowing cinder or ember left in ashes after a fire.
From Old English 'æsel' or similar Germanic roots; the word survived in Scottish dialect with a narrowed meaning referring specifically to hot embers.
Before central heating, people in Scotland would carefully preserve 'aizles'—glowing embers from one fire—to start the next day's fire, so a simple word captured an essential survival skill that people practiced daily for centuries.
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