'aweel' originates from Scots English, specifically the combination of the prefix 'a-' plus 'weel' (Scots for 'well'), where 'a-' comes from an earlier prepositional or verbal-prefix use meaning 'on/in' and 'weel' from Old English 'wel' meaning 'well'.

'aweel' changed from Middle English/early Scots forms such as 'a wel' or 'on wel' into the Scots single word 'aweel' and has been preserved in Scots usage.

Initially it meant roughly 'in a state of wellness' or 'on well'; over time it became an adverb/interjection meaning 'very well' or 'all is well' in Scots.