a teaching/research 'fellow' [=a graduate student who gets money in exchange for teaching/research]
He attended the concert with a 'fellow' student. [=someone who is a student, as he is]
He has always tried to be of service to 'his fellow man'. [=to other people]
(..) - Never make known what you have seen tonight - My lord, we will not - Nay, but swear it - Swear -Aha, oh boy, sayest thou so? - Come on, you hear this fellow, consent to swear - Propose the oath, my lord Never to speak of this that you have seen tonight - My lord, we will not - Nay, but swear it (..)2015 Hamlet
(..) But what is your affair in Elsinore, we'll teach you to drink deep ere you depart My lord, I came to see your father's funeral I pray you do not mock me, fellow student, I think it was to see my mother's wedding Indeed, my lord, it followed hard upon Thrift, thrift Horatio. The funeral baked meats (..)2015 Hamlet