adjective, noun · lone; being the only one; isolated or standing apart from others

广阔的湖面上只有一只孤舟在随风漂荡。

adjective · lonesome; feeling sad or depressed due to a lack of companionship

他晚年过着清孤的生活，很少有人探望。

noun · a first-person pronoun used by ancient kings or dukes to refer to themselves

孤意已决，卿等勿复言。

adjective, noun · having lost one's parents (historically especially the father)

他在战争中失去了双亲，成了一名孤儿。