了 然 于 胸

liǎo rán yú xiōngdictionary entry

(idiom) to be well aware / to understand clearly

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-76d6f708c4d379f7. Source SHA-256: bbc4b27f26bee1a262f4d7939667a040c7857c7fc0200a2fa7a86d3352a09eae.

Original source entry:

了然於胸了然于胸 [liao3 ran2 yu2 xiong1] /(idiom) to be well aware; to understand clearly/

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: 了然於胸

了
le
(completed action marker) / (modal particle indicating change of state, situation now) / (modal particle intensifying preceding clause)
liǎo
to finish / (used with 得[dé] or 不[bù] after a verb to express (im)possibility, as in 忘不了[wàng bu liǎo] "cannot forget") / (literary) (usually followed by a negative such as 無|无[wú] or 不[bù]) completely (not) / entirely (not) / (not) in the least / (bound form) clear in one's mind / to understand clearly
liào
See the full entry for source details.
然
rán
correct / right / so / thus / like this / -ly
于
yú
to go / to take / sentence-final interrogative particle / (of time or place) in / at / on / (indicating any indirect relation) to / toward / vis-à-vis / with regard to / for / (indicating a source) from / out of / (used in comparison) than / (used in the passive voice) by
Yú
surname Yu
胸
xiōng
chest / bosom / heart / mind / thorax

Reference definitions from CC-CEDICT.