The difference between Sure and Wis
When used as adverbs, sure means without doubt, certainly, whereas wis means certainly, surely.
When used as adjectives, sure means physically secure and certain, non-failing, reliable, whereas wis means certain.
Sure is also interjection with the meaning: yes.
Wis is also verb with the meaning: to know.
check bellow for the other definitions of Sure and Wis
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Sure as an adjective:
Physically secure and certain, non-failing, reliable.
Examples:
"This investment is a sure thing. The bailiff had a sure grip on the prisoner's arm."
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Sure as an adjective:
Certain in one's knowledge or belief.
Examples:
"He was sure she was lying. I am sure of my eventual death. John was acting sure of himself but in truth had doubts."
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Sure as an adjective:
Certain to act or be a specified way.
Examples:
"Be sure to lock the door when you leave."
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Sure as an adjective (obsolete):
Free from danger; safe; secure.
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Sure as an adjective (obsolete):
Betrothed; engaged to marry.
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Sure as an adverb (modal adverb):
Without doubt, certainly.
Examples:
"Sure he's coming! Why wouldn't he?"
"Did you kill that bear yourself? ―"I sure did!"
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Wis as an adverb (rare, obsolete, or, dialectal):
Certainly, surely
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Wis as an adverb (rare, obsolete, or, dialectal):
Really, truly
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Wis as an adverb (rare, obsolete, or, dialectal):
Indeed
Examples:
"As wis God helpe me."
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Wis as an adjective (rare, obsolete, or, dialectal):
Certain
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Wis as an adjective (rare, obsolete, or, dialectal):
Sure
Examples:
"He was wis on his word."
" I am wis that it will happen."
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Wis as a verb (obsolete, or, archaic):
To know.
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Wis as a verb (obsolete, or, archaic):
To think, suppose.
Examples:
"Howe'er you wis."
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Wis as a verb (obsolete, or, archaic):
To imagine, ween; to deem.
Examples:
"Nor do I know how long it is (For I have lain entranced, I wis)."