What is the meaning of the English word
(adjective; verb = nag) being annoying or irritating or painful, by being persistent
1. I wish my parents would stop nagging me to go back to university.
2. I think you should tell the doctor that you have had that nagging pain in your shoulder for several months.
3. I realize this agreement looks good on paper, but for days I have had nagging doubts about it, so I have decided not to sign the contract.