Final answer:
The word that best fits the definition of sly dealings and skill in deceiving is 'guile'.
Step-by-step explanation:
'Guile' is the word that best fits the definition of sly dealings and skill in deceiving. It refers to the ability to be crafty, cunning, and deceptive in one's actions. For example, a person might use guile to manipulate others into believing something false or to gain an unfair advantage in a situation.
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