In the manner or direction of a finger; using fingers or following the pattern that fingers would make.
From 'finger' plus the adverbial suffix '-wise' (Old English origin, meaning direction or manner). This archaic term appeared in technical or poetic contexts.
When your fingers point "fingerwise," they naturally follow the path of least resistance determined by your hand's skeletal structure—which is exactly how ancient cultures mapped out paths and traced maps using hands.
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