living alone;  solitude;  solitary life
 single-person cell;  solitary cell;  solitary confinement cell
 going alone;  self-reliance
 walking alone;  walking without assistance;  unique;  matchless;  unparalleled
 single-pronged vajra;  tokko;  dokko;  cloth of a tokko pattern
 udo (plant related to ginseng, used in medicine and cooking) (Aralia cordata)
 self-reliance;  acting according to one's own ideas and beliefs
 single-person cell;  solitary cell;  isolation cell;  solitary confinement cell
 antitrust law;  Antitrust Act
 independent administrative corporation (institution, agency);  German law
 isolated gain in a slow or declining market (stock, currency, etc.)
 isolated fall of a security or currency in an otherwise strong market