not able to occur or be done; unreal

unimaginable; unfathomable; describes something so amazing or mysterious that it is beyond logic or common sense

unable to be avoided; inevitable; unavoidably

Used to ask for permission or to inquire about the possibility of an action, meaning "is it okay?" or "can you?"; literally the "A-not-A" question form of [[可以|可以|ke3 yi3]].

absolutely necessary; essential

absolutely necessary; essential; cannot be omitted

impervious to reason; describes someone who is stubborn, headstrong, or refuses to listen to common sense

inextricably linked; too close to be separated

incapable of being separated, divided, or severed; inalienable; indivisible

(idiom) describes a situation that has become so bad it is uncontrollable, unmanageable, or impossible to salvage

(idiom) one's contributions cannot be ignored; having performed a great service that cannot be left unrecognized

Describes a situation where things are so tangled or intense that they cannot be ended or resolved; most commonly used to describe being extremely busy or locked in a fierce argument

rare; hard to come by

not to be divulged; to be kept secret (usually derogatory, referring to shameful motives or secrets)

not a single one can be omitted; every part is essential for a result or a whole

indescribably beautiful or ingenious; so wonderful that it is impossible to express in speech, sometimes used ironically to mean marvelous

unreliable; untrustworthy; not to be depended on

must; have to; it is absolutely necessary to

Describes a situation that, once started, becomes impossible to stop or manage

too great to be calculated; incalculable; beyond measure

(idiom) impossible to resist; an irresistible force

(idiom) extremely solid and impossible to destroy; impregnable; invulnerable

(idiom) good opportunities are hard to come by and must not be missed; no time to lose; now or never

(idiom) to consider oneself unexcelled in the world; extremely arrogant and self-important

Something that can only be found by accident and not through seeking; describes a rare or lucky encounter that happens serendipitously.

impossible to resist or withstand; overwhelming

Unable to be erased or forgotten; refers to impressions, contributions, or memories that remain vivid or significant forever.

deep and unmeasurable; so deep that it cannot be measured, often used to describe profound truths or people's unpredictable and enigmatic nature

indestructible and firm; often used to describe abstract things like friendship, alliances, or long-held beliefs that are difficult to change or destroy

An unavoidable event caused by nature or human action, such as a natural disaster or war, that prevents someone from fulfilling a contract; act of God.

cannot be mentioned in the same breath; literally means one must not speak of two things on the same day because they are too different to be compared, especially when one is far superior to the other or has changed significantly from the past

(idiom) unable to restrain one's anger; in a towering rage

not clear or capable of being understood; incognizable

impassable; insuperable; impossible to cross or overcome

not necessarily impossible or impermissible; acceptable; fine; okay

to have boundless prospects; to be beyond measurement or calculation

Used to express that something is absolutely not allowed, or that it should not be done under any circumstances

too high to reach or climb; unattainable; used to describe goals or objects that are impossible to achieve

(of a disease) so serious that no medicine can cure it

sacred and inviolable; holy and not to be infringed upon

(idiom) extremely anxious and unable to wait any longer; eager to do something

too impatient to wait; unable to bear the delay any longer

(idiom) to be happy to the extreme; as pleased as punch; overjoyed to the point of being unable to contain oneself

(of a situation, process, or trend) irreversible; impossible to be turned back

terribly panicked and fearful as if one could not last another day; to be on tenterhooks

One cannot judge a person by their appearance; often followed by the phrase [[海水不可斗量|海水不可斗量|hai3 shui3 bu4 ke3 dou3 liang2]]

Describing language, behavior, or items so vulgar and lacking in taste that they are impossible to tolerate.

difficult to size up or predict; uncanny; unpredictable

extraordinary or beautiful beyond description; impossible to distinguish or identify due to brilliance or complexity