Chinese characters
Modern examples particularly include Chinese characters for SI units. In Chinese these units are disyllabic and standardly written with two characters, as Li Mi  limi "centimeter" (Li  centi-, Mi  meter) or Qian Wa  qianwa "kilowatt". However, in the 19th century these were often written via compound characters, pronounced disyllabically, such as Qian  for Qian Wa  or Li  for Li Mi  - some of these characters were also used in Japan, where they were pronounced with borrowed European readings instead. These have now fallen out of general use, but are occasionally seen. Less systematic examples include Tu  tushuguan "library", a contraction of Tu Shu Guan , A four-morpheme word, She Hui Zhu Yi  shehui zhuyi "socialism", is commonly written with a single character formed by combining the last character, Yi , with the radical of the first, She , yielding roughly Shi Yi .
What are disyllabic and usually written with two characters?
SI units
Modern examples particularly include Chinese characters for SI units.
two characters