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Certainty and Doubt - Uncertainty

Here you will learn some English words related to uncertainty such as "unconvinced", "shaky", and "reputed".

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Words Related to Certainty and Doubt
reputed
reputed
[Adjective]

considered to be a certain way, though not necessarily confirmed

Ex: He is a reputed expert in ancient languages. 
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reputedly
reputedly
[Adverb]

used to say that something is true according to what people say, although it is uncertain

Ex: The castle is reputedly haunted by the ghost of a former king. 
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to shake
to shake
[Verb]

to make something, particularly a belief or idea, less certain

Ex: The new evidence presented in court threatened to shake the foundations of the theory. 
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shaky
shaky
[Adjective]

uncertain about the exact details of something

Ex: His shaky alibi made the police suspect his story. 
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should
should
[Verb]

used to indicate a degree of expectation regarding something that is likely to happen

Ex: You should expect delays during rush hour traffic. 
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somehow
somehow
[Adverb]

in a way or by some method that is not known or certain

Ex: Somehow, she managed to find her way home in the dark. 
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someway
someway
[Adverb]

in some obscure manner or by some unspecified means that one does not know or understand thoroughly

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supposedly
supposedly
[Adverb]

used to suggest that something is assumed to be true, often with a hint of doubt

Ex: She was supposedly the last person to leave the building, according to eyewitnesses. 
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tentative
tentative
[Adjective]

not firmly established or decided, with the possibility of changes in the future

Ex: They reached a tentative agreement on the terms of the contract, pending further negotiation. 
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tentatively
tentatively
[Adverb]

in a way that is not certain or definite and might be changed later

Ex: She tentatively agreed to join the team, pending further details. 
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the jury [is] (still|) out

‌used to express that no decision is made or no opinion is formed about something due to uncertainty

Ex: The jury is still out on whether the new policy will actually work. 
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there is many a slip (twixt|between) cup and lip

used to imply that even when something seems certain or likely to happen, there are many opportunities for it to go wrong or for unexpected events to intervene before it is actually achieved

Ex: The team was on the verge of winning the championship, but as they say, there is many a slip twixt cup and lip, and they ultimately lost the game due to a last-minute mistake. 
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there [is] no question of

used to convey that something cannot happen under any given circumstances

Ex: There is no question of the project being postponed. 
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uncertain
uncertain
[Adjective]

not definitively known or decided

Ex: The outcome of the negotiations remains uncertain as both parties are still in disagreement. 
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uncertainty

a condition or situation that is unsettled, dependent on chance, or unpredictable, often causing doubt

Ex: The financial market is full of uncertainties. 
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unclear
unclear
[Adjective]

not exactly known or expressed, often leading to confusion or ambiguity

Ex: It’s still unclear whether the event will be postponed due to the weather. 
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unconvinced
unconvinced
[Adjective]

having doubts about the validity or credibility of something

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unlikely
unlikely
[Adjective]

having a low chance of happening or being true

Ex: It's unlikely that it will rain tomorrow, as the weather forecast predicts clear skies. 
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unsure
unsure
[Adjective]

having doubts about or no confidence in someone or something

Ex: He was unsure if he wanted pizza or pasta for dinner. 
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to weaken
to weaken
[Verb]

to become less resolved or determined

Ex: Despite her initial enthusiasm, her resolve began to weaken as the challenges of the project became apparent. 
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would
would
[Verb]

used to express an opinion about which one is not certain

Ex: She would probably agree with your proposal if you explain it clearly. 
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(you|one) can never tell

used to say that one can never be sure of something

Ex: In the ever-changing world of technology, you can never tell which new innovation will become the next big thing. 
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