English English
CEFR LEVEL
3335 entries have no recorded CEFR level and are included in All.
On the up and up
idiomLegitimate, honest, and strictly adhering to ethical standards
↗On the Warpath
idiomExtremely angry, aggressive, and actively looking for a fight or confrontation
↗on the way
phrase A1traveling toward a destination; arriving soon; in the course of traveling toward a destination; along the route
↗on the whole
phraseConsidering everything in general; taking all aspects into account
↗on thin ice
idiomIn a precarious, fragile, or risky position where any misstep could lead to disaster
↗on time
phrase A1punctual; according to the expected schedule; not late; not late; arriving or happening at the arranged time
↗On Top of the World
idiomFeeling ecstatic, jubilant, and immensely proud or successful
↗on track
idiom A2proceeding, developing, or progressing smoothly according to plan
↗on trial
phrase B2being tried in a court of law, or undergoing a test period; Being tested or sampled before a final decision or formal purchase is made
↗onboard
word A1to welcome and integrate a new employee or client
↗once
word A1one time; as soon as something happens one time only; at some time in the past; formerly on one occasion only; at a time in the past
↗Once and for All
idiomPermanently, decisively, and finally resolving an ongoing dispute or problem
↗Once Bitten, Twice Shy
proverbA bad or painful experience makes a person cautious and self-protective against repeated harm
↗Once in a Blue Moon
idiomVery rarely; occurring on extremely infrequent occasions.
↗Once in a lifetime
phrasean exceptionally rare, monumental, or unique experience unlikely to happen again
↗once in a while
phraseSometimes, but not frequently; on rare occasions
↗once upon a time
phraseA long time ago; at an earlier period in the past
↗one
word A1the number 1, or a single person or thing the number equivalent to the sum of zero and one; a single person or thing
↗one by one
phrase A1separately and in order, one after another
↗One Fell Swoop
idiomIn a single sudden, decisive action or devastating stroke.
↗one million
phrase A2the number 1,000,000; ten lakhs
↗one more
phrase A1an additional one; one extra thing or person
↗one more day
phrase B1a single additional day of time
↗one more time
phrase A2once again; another single repetition
↗one reason
phrase A1a single cause or explanation for something
↗One-Trick Pony
idiomA person, group, or strategy with only one special skill, trick, or area of competence.
↗onerous
word C1Involving a great deal of effort, difficulty, or burdensome responsibility.
↗onion
word A2a swollen edible bulb with a pungent taste and smell, composed of several concentric layers; a round vegetable with a strong taste and smell, made up of many layers a round vegetable with a strong smell and flavor, usually used in cooking
↗online
word A2connected to or done through the internet connected to or available through the internet
↗only
word A1no more than; just one or just this without others; solely; without others; solely
↗only human
phrase A2having natural human weaknesses and likely to make mistakes
↗only if
phrase A1on the condition that and not otherwise
↗only then
phrase A1at that specific time and not before
↗only when
phrase A1not before the moment that something happens
↗only you
phrase A1no one else besides you; you alone
↗onomatopoeia
word C2the formation of a word from a sound associated with what is named
↗opaque
word B2Not able to be seen through; not transparent, or hard to understand.
↗open
word A1allowing access, passage, or view; not closed or locked; not closed; to make something not closed or available to move something so as to allow access; to begin to move something so that it is no longer closed; not closed; to move something so as to allow access; to begin to move something so that it is no longer closed; not closed
↗Open a Can of Worms
idiomTo uncover a complicated and troublesome situation that leads to endless unforeseen problems.
↗open the door
idiom A1to create opportunities or possibilities for advancement
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