同居
どうきょ · doukyo · JLPT N1 · noun
living together
🏠 同 = together + 居 = dwell, so 同居 = dwelling together, living together under one roof
同 (dō) means same or together, and 居 (kyo) means to live or reside. The pair describes couples or roommates who share a home.
同 — 冂 enclosure + 一 + 口 mouth
Originally depicted multiple mouths gathered under one cover or enclosure, suggesting people speaking together in agreement. From this image of voices joining, it came to mean 'same,' 'together,' or 'alike.' The shared cover symbolizes unity.