pattern

Essential Vocabulary 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.

Review

Flashcards

Forms

Spelling

Quiz

Start learning
Essential Words Needed for TOEFL
certainty
certainty
[noun]

the state of being sure about something, usually when there is proof

Ex: Her certainty in her ability to complete the marathon came from months of dedicated training. 
Close
Sign in
doubt
doubt
[noun]

a feeling of disbelief or uncertainty about something

Ex: Doubt crept into her mind as she pondered the possibility of failure. 
Close
Sign in
confusion
confusion
[noun]

a state of being confused and not having a clear understanding of an action, behavior, etc.

Ex: The student's confusion was evident when he couldn't solve the math problem. 
Close
Sign in
confidence

a state of hopeful expectation that things will turn out favorably

Ex: She faced the challenge with confidence. 
Close
Sign in
probability

the likelihood or chance of an event occurring or being true

Ex: The probability of winning the lottery is extremely low. 
Close
Sign in
probable
probable
[Adjective]

having a high possibility of happening or being true based on available evidence or circumstances

Ex: With clear skies and no signs of storm, it seems probable that the outdoor event will proceed as planned. 
Close
Sign in
to suspect

to think that something is probably true, especially something bad, without having proof

Ex: I suspect he's been lying about where he was last night. 
Close
Sign in
to assure
to assure
[Verb]

to make someone feel confident or certain about someone or something

Ex: The company assured its customers of the product's quality 
Close
Sign in
to hesitate

to pause before saying or doing something because of uncertainty or nervousness

Ex: When asked about the promotion, Sarah hesitated before responding. 
Close
Sign in
hesitation

a feeling of doubt, uncertainty, or reluctance before acting

Ex: She showed hesitation before agreeing to the risky plan. 
Close
Sign in
conviction

a belief or opinion that is very strong

Ex: Despite criticism, she held onto her conviction that renewable energy is the key to a sustainable future. 
Close
Sign in
to guarantee

to make sure that something will occur

Ex: The meticulous planning guarantees that the event will run smoothly without any hitches. 
Close
Sign in
to ensure
to ensure
[Verb]

to make sure that something will happen

Ex: She ensures the quality of the products before they are shipped. 
Close
Sign in
to expect
to expect
[Verb]

to think or believe that it is possible for something to happen or for someone to do something

Ex: The weather forecast led us to expect rain this weekend. 
Close
Sign in
speculative
speculative
[Adjective]

according to opinions or guesses instead of facts or evidence

Ex: The article contained speculative theories about the origins of the universe. 
Close
Sign in
concrete
concrete
[Adjective]

according to facts instead of opinions

Ex: In scientific research, it is crucial to provide concrete evidence to support hypotheses and conclusions. 
Close
Sign in
undeniable
undeniable
[Adjective]

clearly true and therefore impossible to deny or question

Ex: The impact of climate change on the environment is undeniable, as evidenced by rising temperatures and melting ice caps. 
Close
Sign in
debatable
debatable
[Adjective]

subject to argument or disagreement

Ex: The decision to cut funding for the arts is highly debatable, with strong opinions on both sides. 
Close
Sign in
inevitable
inevitable
[Adjective]

unable to be prevented

Ex: As technology advances, it becomes increasingly inevitable that automation will replace certain jobs. 
Close
Sign in
bound
bound
[Adjective]

likely to happen or sure to experience something

Ex: With the storm approaching, they were bound to face heavy rain and strong winds. 
Close
Sign in
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. 
Close
Sign in
convinced
convinced
[Adjective]

having a strong belief in something

Ex: After the meeting, she was convinced that the new strategy was the best approach. 
Close
Sign in
set
set
[Adjective]

prepared or likely prepared for something

Ex: With all the decorations in place and the food ready, we were set for the party to begin. 
Close
Sign in
inconclusive
inconclusive
[Adjective]

not producing a clear result or decision

Ex: The medical tests were inconclusive, so further examination is needed to determine the cause of the symptoms. 
Close
Sign in
presumably
presumably
[Adverb]

used to say that the something is believed to be true based on available information or evidence

Ex: She left the office early, presumably to attend a family event. 
Close
Sign in
to assume
to assume
[Verb]

to think that something is true without having proof or evidence

Ex: She often assumes that everyone agrees with her perspective. 
Close
Sign in
assumption

an idea or belief that one thinks is true without having a proof

Ex: His assumption about the meeting time was incorrect. 
Close
Sign in
decidedly
decidedly
[Adverb]

in a way that is certain and beyond any doubt

Ex: The weather was decidedly colder than the forecast suggested. 
Close
Sign in
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. 
Close
Sign in
doubtful
doubtful
[Adjective]

improbable or unlikely to happen or be the case

Ex: Given the poor weather conditions, it's doubtful that the outdoor concert will take place as scheduled. 
Close
Sign in
dubious
dubious
[Adjective]

causing doubt or suspicion

Ex: His dubious explanation for being late didn’t seem believable. 
Close
Sign in
LanGeek
Download LanGeek app