成天 (chéng tiān) — all day long; all the time

Definition

成天 means 'all day long / constantly' and emphasizes unbroken, habitual duration — stronger than 时时 ('often, now and then') and informal in tone.

adverb
all day longall the time

Examples

  • 成天
    Tā chéng tiān dōu zài máng gōng zuò, hěn shǎo xiū xi.
    He's busy with work all day long and rarely rests.
  • 成天
    Bié chéng tiān bào yuàn le, xiǎng bàn fǎ jiě jué wèn tí ba.
    Stop complaining all the time; think of a way to solve the problem.
  • 成天
    Tā chéng tiān pào zài tú shū guǎn lǐ xué xí.
    She spends all day studying in the library.

Origin

Compound word
构词法gòucífǎ
偏正piānzhèngModifier + head

The first part narrows down the second: it says what kind of thing the head is.

'成' means whole and '天' means day, so together they express the whole day.

Characters in this word

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

Meaning part形符xíngfú
Sound part声符shēngfú
dīngchéng
Close in sound todayThe sound part was a clue two thousand years ago — it often still helps, but not always.

成 puts 戊, a weapon, beside 丁, which gives the sound. The weapon part relates to protection, as in the old sense of city walls.

Open 成 →

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

Meaning part形符xíngfú
Sound part声符shēngfú
dīngtiān
The sound has drifted apartThe sound part was a clue two thousand years ago — it often still helps, but not always.

The shape comes from a frontal standing man 大 with a head; 天 pairs 大 with 丁 for sound.

Open 天 →

Browse more HSK 7-9 words or search the full 43,000-word dictionary.