Artificial intelligent assistant

fellow-soldier

ˌfellow-ˈsoldier
  One who fights under the same standard as another; a companion-in-arms.

1526–34 Tindale Phil. ii. 25 Epaphroditus..my..felowe soudier. 1593 Shakes. 3 Hen. VI, iv. vii. 70 Come, fellow Souldior, make thou proclamation. 1777 W. Robertson Hist. Amer. (1783) II. 244 To avoid the imputation of cowardice from their fellow-soldiers. 1882 J. Taylor Sc. Covenanters 161 He met with his former fellow-soldier.

Oxford English Dictionary

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