'Another's' in the Bible

So if I, the Lord and the Teacher, washed your feet, you ought to wash one another’s feet as well.

Who are you to judge the servant of another? Before his own master he stands [approved] or falls [out of favor]. And he [who serves the Master—the Lord] will stand, for the Lord is able to make him stand.

Carry one another’s burdens and in this way you will fulfill the requirements of the law of Christ [that is, the law of Christian love].

For if anyone thinks he is something [special] when [in fact] he is nothing [special except in his own eyes], he deceives himself.