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Essential Words Needed for TOEFL - Certainty and Doubt

Here you will learn some English words about certainty and doubt, such as "doubt", "assure", "expect", etc. that are needed for the TOEFL exam.

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Essential Words Needed for TOEFL
certainty
[noun]
the state of being sure about something, usually when there is proof
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doubt
[noun]
a feeling of uncertainty about something
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confusion
[noun]
a state of being confused and not having a clear understanding of an action, behavior, etc.
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confidence
[noun]
a feeling of hopefulness that derives from an optimistic attitude and mindset that allows one to see the bright side of things especially future events
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probability
[noun]
how possible or likely something is to happen
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probable
[adjective]
with a high possibility to happen or be true but not certain
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to suspect
[verb]
to think that something is probably true, especially something bad, without having proof
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to assure
[verb]
to make someone sure about someone or something
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to hesitate
[verb]
to pause before saying or doing something because of uncertainty or nervousness
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hesitation
[noun]
the act of pausing before doing or saying something because one feels unsure
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conviction
[noun]
a belief or opinion that is very strong
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to guarantee
[verb]
to make sure that something will occur
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to ensure
[verb]
to make sure that something will happen
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to expect
[verb]
to think or believe that it is possible for something to happen or for someone to do something
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speculative
[adjective]
according to opinions or guesses instead of facts
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concrete
[adjective]
according to facts instead of opinions
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undeniable
[adjective]
absolutely certain or true; unable to be denied or questioned
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debatable
[adjective]
unclear or uncertain because of the involvement of many different opinions
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inevitable
[adjective]
bound to happen in a way that is impossible to avoid or prevent
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bound
[adjective]
likely to happen or sure to experience something
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tentative
[adjective]
(of an agreement, etc.) indefinite or uncertain because one might make some changes to it in the future
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convinced
[adjective]
having a strong belief in something or being certain about it
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set
[adjective]
prepared for something or to do something; likely to do something
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inconclusive
[adjective]
not producing a clear result or decision
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presumably
[adverb]
used to say that the something is believed to be true based on available information or evidence
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to assume
[verb]
to think that something is true without having proof or evidence
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assumption
[noun]
an idea or belief that one thinks is true without having a proof
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decidedly
[adverb]
in a way that is certain and beyond any doubt
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supposedly
[adverb]
used to suggest that something is assumed to be true, often with a hint of doubt
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doubtful
[adjective]
improbable or unlikely to happen or be the case
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dubious
[adjective]
likely to be dishonest
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