In the manner of chance or a chancer; regarding chance or probability; in a way that relies on luck.
From chance + -wise (suffix meaning 'in the manner of' or 'with respect to'), similar to clockwise or lengthwise; indicates direction, manner, or perspective.
The -wise suffix is ancient (from Old English 'wīsa' meaning 'way' or 'manner'), so chancewise literally means 'in the way of chance'—it's a compound that's possible but rarely used!
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