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Advanced Vocabulary for TOEFL - Doubt and Certainty

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

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Advanced Words Needed for TOEFL
to admit of

to let something happen or exist

Ex: The flexible schedule of this job admits of a good work-life balance. 
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to cinch
to cinch
[Verb]

to secure, guarantee, or make certain of something

Ex: She cinched her place in the competition with a flawless performance. 
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to divine
to divine
[Verb]

to guess or deduce information using intuition or an inexplicable sense of inner knowledge

Ex: He divined the answer to the riddle without any clues. 
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to guesstimate

to estimate something by calculating and guessing

Ex: I had to guesstimate the number of attendees for the event since not everyone RSVP'd. 
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to hazard
to hazard
[Verb]

to state an opinion, guess, suggestion, etc. even though there are chances of one being wrong

Ex: He hesitated but decided to hazard a guess about the answer. 
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to scruple

to hesitate or be dubious about doing something that one thinks might be wrong or immoral

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to surmise

to come to a conclusion without enough evidence

Ex: Unable to find the missing document, he could only surmise that it might have been misplaced. 
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to warrant

to give good reasons to justify a particular action

Ex: The evidence presented warrants further investigation into the matter. 
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axiomatic
axiomatic
[Adjective]

clearly true and requiring no explanation

Ex: It's axiomatic that hard work leads to success. 
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ambiguous
ambiguous
[Adjective]

having more than one possible meaning or interpretation

Ex: The term “investment” can be ambiguous in different financial contexts. 
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apocryphal
apocryphal
[Adjective]

(of a statement or story) unlikely to be authentic, even though it is widely believed to be true

Ex: He shared an apocryphal story about the founding of the city that many people still believe. 
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bewildered
bewildered
[Adjective]

experiencing confusion

Ex: After getting lost in the maze, she felt completely bewildered and unsure of which way to go. 
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categorical
categorical
[Adjective]

without a doubt

Ex: His categorical denial of the allegations was clear and unambiguous. 
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cliffhanging
cliffhanging
[Adjective]

(of a situation, movie, etc.) having an unclear ending that makes it enticing

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decisive
decisive
[Adjective]

(of a person) able to make clear, firm decisions quickly, especially in challenging situations

Ex: The decisive leader quickly chose a course of action, even when faced with uncertainty. 
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dogmatic
dogmatic
[Adjective]

convinced that everything one believes in is true and others are wrong

Ex: His dogmatic views on politics made it difficult to have a productive conversation with him. 
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equivocal
equivocal
[Adjective]

having two or more possible meanings

Ex: The politician gave an equivocal answer about his stance on the issue. 
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halting
halting
[Adjective]

acting or talking with hesitation due to uncertainty or lack of confidence

Ex: Her halting speech revealed her nervousness about presenting in front of the class. 
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incontrovertible
incontrovertible
[Adjective]

true in a way that leaves no room for denial or disagreement

Ex: The incontrovertible evidence left no doubt about the defendant’s guilt. 
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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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robust
robust
[Adjective]

remaining strong and effective even when facing challenges or difficulties

Ex: The CEO's robust leadership style transformed the struggling company into an industry leader within a few years. 
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wavering
wavering
[Adjective]

unable to decide between two opinions, possibilities, etc.

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buoyancy
buoyancy
[noun]

a feeling of hopefulness and confidence that makes one remain cheerful, especially in sad or unpleasant situations

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certitude
certitude
[noun]

the feeling of complete certainty

Ex: She spoke with certitude about the accuracy of her research findings. 
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conjecture

an idea that is based on guesswork and not facts

Ex: The detective's conjecture about the suspect's motives proved to be incorrect. 
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diffidence

shyness due to a lack of confidence in oneself

Ex: Her diffidence kept her from speaking up in meetings. 
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educated guess

a guess that is made according to one's experience or knowledge thus is more likely to be true

Ex: Based on her experience, she made an educated guess about the project's completion date. 
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foregone conclusion

something that is assumed to be true or already decided upon before any evidence or arguments are presented

Ex: Many voters saw his victory as a foregone conclusion. 
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plight
plight
[noun]

an unpleasant, sad, or difficult situation

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quandary
quandary
[noun]

a state of uncertainty about what decision to make in a challenging situation

Ex: She was in a quandary about whether to accept the risky job offer. 
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vagueness
vagueness
[noun]

the lack of clear expression, knowing, describing, or decision

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