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THE ENGLISH DICTIONARY

English English

CEFR LEVEL

3335 entries have no recorded CEFR level and are included in All.

29 words & expressions

Oar

word C1

a long pole with a flat blade used to propel and steer a boat through water by manual rowing

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obliterate

word C1

to destroy completely; to remove all traces of something; To destroy utterly; wipe out completely, to erase or remove something completely.; Destroy utterly; wipe out completely.

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Oblivion

word C1

the state of being completely forgotten; unconsciousness; complete forgetfulness

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oblivious

word C1

Not aware of or concerned about what is happening around oneself.

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obstinate

word C1

Stubbornly refusing to change one's opinion or chosen course of action, despite attempts to persuade one to do so.

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occult

word C1

Relating to mysterious, supernatural, or magical powers and practices.

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ocean acidification

word C1

The continuous reduction in pH levels of Earth's oceans caused by the uptake of anthropogenic carbon dioxide from the atmosphere.

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odyssey

word C1

A long and eventful or adventurous journey.

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oligarchy

word C1

A small group of people having control of a country, organization, or institution.

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omission

word C1

The action of excluding or leaving out someone or something; a failure to include.; someone or something that has been left out or excluded the action of excluding or leaving out someone or something; a failure to include The act of leaving out or excluding something; something that has been left out.

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omnipresent

word C1

Present everywhere at the same time; widely or constantly encountered.

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onerous

word C1

Involving a great deal of effort, difficulty, or burdensome responsibility.

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open up

phrasal verb C1

To create new opportunities, or to speak freely and candidly; to speak freely or openly about one's feelings; to make available or accessible

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optimization

word C1

The action of making the best or most effective use of a situation or resource.

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optimize

word C1

To make the best or most effective use of a situation, opportunity, or resource.

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optimized

word C1

Made as effective, functional, or efficient as possible.

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optimum

word C1

Most favorable, advantageous, or conducive to a desired outcome; best.

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oratory

word C1

The art or practice of formal public speaking, especially in an eloquent and persuasive manner.

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orchestrate

word C1

To plan, arrange, or coordinate the elements of a situation to achieve a desired result, often secretly.

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ordeal

word C1

a very painful, severe, or difficult experience

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oscillate

word C1

To swing back and forth steadily, or waver between different opinions or states.

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ostentatious

word C1

Characterized by pretentious or showy display designed to impress others.

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Outwardly

word C1

on the surface; externally; in appearance

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overarching

word C1

Comprehensive or all-embracing; dominating or encompassing everything.

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overcrowding

word C1

The presence of more people or things in a space than is comfortable, safe, or permissible.

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overgrazing

word C1

The excessive grazing of pasture by livestock to the point where vegetative cover is destroyed and soil eroded.

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overstimulated

word C1

Excessively agitated or overwhelmed by too much sensory or cognitive stimulation.

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oxidation

word C1

The process or result of oxidizing; a chemical reaction in which a substance gains oxygen or loses electrons.

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oxidative

word C1

Relating to or involving oxidation, particularly processes that can cause cellular damage through free radicals.

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