不 可 同 日 而 语

bù kě tóng rì ér yǔdictionary entry

lit. mustn't speak of two things on the same day (idiom) / not to be mentioned in the same breath / incomparable

Sources & editorial notes

Reference definitions: CC-CEDICT contributors and MDBG, CC BY-SA 4.0. Source release 2026-10-27T01:55:52Z. Imported 2026-10-27. Definition wording and meaning order are retained. Recognized pronunciation references are displayed with tone marks; the original source record is available below.

Source record: cd-2988ffc5424e81a5. Source SHA-256: bbc4b27f26bee1a262f4d7939667a040c7857c7fc0200a2fa7a86d3352a09eae.

Original source entry:

不可同日而語 不可同日而语 [bu4 ke3 tong2 ri4 er2 yu3] /lit. mustn't speak of two things on the same day (idiom); not to be mentioned in the same breath/incomparable/

Reference definitions and teaching material have separate provenance.

Reference information

The definitions above are from CC-CEDICT. Examples and usage notes are available on selected entries.

Character information

View the individual characters. Their meanings do not necessarily explain the meaning of the whole word.

Other forms in these source records: 不可同日而語

不
bù
no / not so / (bound form) not / un-
可
kě
(prefix) can / may / able to / -able / to approve / to permit / to suit / (particle used for emphasis) certainly / very / but / however
kè
used in 可汗[kè hán]
同
tóng
like / same / similar / together / alike / with
tòng
used in 胡同[hú tòng] / used in 衚衕|胡同[hú tòng]
日
rì
(bound form) sun / day / day of the month / (bound form) Japan (abbr. for 日本[Rì běn]) / (vulgar) to fuck / to have sex with
而
ér
and / as well as / and so / but (not) / yet (not) / (indicates causal relation) / (indicates change of state) / (indicates contrast)
语
yǔ
dialect / language / speech
yù
(literary) to tell / to let (sb) know

Reference definitions from CC-CEDICT.