Vocabulary for IELTS (General) - Certainty and Uncertainty

Here you will learn some English words about certainty and uncertainty, such as "confusion", "inevitable", "concrete", etc. that are needed for the IELTS exam.

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to bet [verb]

to express confidence or certainty in something happening or being the case

Ex: He 's betting that the new restaurant will become a popular spot in town .

certainty [noun]

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

Ex: Her certainty about the company 's financial stability allowed her to invest with confidence .

confidence [noun]

the belief in one's own ability to achieve goals and get the desired results

Ex: The athlete 's confidence grew after each successful performance .

confusion [noun]

a state of disorder in which people panic and do not know what to do

Ex: The sudden change in plans caused a lot of confusion among the team .

convinced [adjective]

(of a person) strongly holding political or religious views

Ex: As a convinced skeptic , she questioned every claim without evidence .

to ensure [verb]

to make sure that something will happen

Ex: The teacher is ensuring that students understand the new lesson .

definite [adjective]

expressed with clarity and precision, leaving no doubt as to the meaning or intention

Ex: The architect created definite schematics with precisely measured dimensions to guide the construction workers .

to expect [verb]

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

Ex: She did n't expect such a warm reception at the event .

to forecast [verb]

to predict future events, based on analysis of present data and conditions

Ex: The software can forecast future trends in user behavior by analyzing historical data .

to hesitate [verb]

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

Ex: John hesitated before entering the unfamiliar building , wondering if he was in the right place .

inevitable [adjective]

unable to be prevented

Ex: Given the current trajectory of climate change , it 's inevitable that sea levels will continue to rise .

probability [noun]

(mathematics) a number representing the chances of something specific happening

Ex: She calculated the probability of her team winning based on past performances .

somehow [adverb]

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

Ex: The team was behind , but they somehow won the game .

to speculate [verb]

to form a theory or opinion about a subject without knowing all the facts

Ex: When the stock prices suddenly dropped , investors started to speculate on the reasons for the market downturn .

to suspect [verb]

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

Ex: Considering the clouds on the horizon , I suspect it might rain this afternoon .

assured [adjective]

displaying confidence in oneself and one's capabilities

Ex: The actress gave an assured performance , effortlessly conveying the emotions of her character .

concrete [adjective]

according to facts instead of opinions

Ex: The company 's decision-making process is based on concrete data and market analysis rather than speculation .

doubtful [adjective]

improbable or unlikely to happen or be the case

Ex: The team 's chances of winning the championship seem doubtful after their recent string of losses .

dubious [adjective]

(of a person) unsure or hesitant about the credibility or goodness of something

Ex: He felt dubious about the reliability of the product , given its low price .

hypothesis [noun]

an explanation based on limited facts and evidence that is not yet proved to be true

Ex: Before conducting the study , the team proposed a hypothesis about the effects of the new drug .

paradox [noun]

a logically contradictory statement that might actually be true

Ex: It ’s a paradox that standing is more tiring than walking , even though walking requires more movement .

tentatively [adverb]

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

Ex: He tentatively suggested a new approach , awaiting feedback from the team .

uncertainty [noun]

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

Ex: Political uncertainties affected international trade .

undeniably [adverb]

in a way that is definite and cannot be rejected or questioned

Ex: The impact of climate change is undeniably visible .

confidently [adverb]

in a manner that shows strong belief in one's own skills or qualities

Ex: They confidently tackled the difficult project without hesitation .

prediction [noun]

the act of saying what one thinks is going to happen in the future or what the outcome of something will be

Ex: The company ’s prediction for next year ’s profits is optimistic .

unlikely [adjective]

having a low chance of happening or being true

Ex: Winning the lottery is unlikely , given the astronomical odds against it .

a priori [adjective]

using the previous knowledge, reasoning, or general facts to decide the likely result of something

decidedly [adverb]

in a way that is certain and beyond any doubt

Ex: He was decidedly uninterested in the topic of the conversation .

presumption [noun]

a belief that something is true without any proof

Vocabulary for IELTS (General)
Communication	Art	Music	Literature
Movie and Theater	The Media	Argument and Agreement	Certainty and Uncertainty
Expressing an Opinion	Advice and Suggestion	Making a Decision	Sickness and Health
Cause and Effect	Success and Failure	Education	Space
Money	Business	The environment	Likes and Dislikes
Persuasion and Involvement	Similarity and Difference	Signposting	Problems and Solutions
Being in Charge	Talking about Senses	Possession	Talking about Change
Talking about Events and Incidents	Lifestyles	Tourism	The Planet Earth
Phrasal Verbs