2002400 jmdict A [id=2042359]

ううん[spec1]；うーん[spec1]；ウーン
[1][int]
  um; er; well
  [see=1001090・うん[2]]
[2][int]
  [restr=ううん]
  nuh-uh; no
[3][int]
  oof
  [see=1001090・うん[3]]