衍
yǎn HSK7

overflow

衍 yǎn
proliferating verb
extending or spreading out continuously, often used in describing scenes or processions that seem to lengthen or propagate in a rhythmic, continuous way.
develop
to spread out, develop, or evolve over time
overflow verb
to flow over, flood, or inundate
superfluous
redundant or unnecessary, especially in the context of extra characters in a text

Frequency
Character
Written text
2,437th most common 20.8 per million
Movie subtitles
2,985th most common 3.57 per million appears in 2% of films
Word
Movie subtitles
0.060 per million appears in 0% of films
Written text
2.34 per million

Details
HSK 2.0
Level 6
HSK 3.0
Level 7
Strokes
9
Unicode
U+884D

Sources
Definitions
CC-CEDICT
Frequency data
MTSU Chinese text computingSUBTLEX-CHBCC Corpus (BLCU)