a regañadientes

= grudgingly, grudging, begrudgingly, unwillingly
Ex: Another point which we hope these introductory remarks make clear is that AACR2, even more than the 1967 version, is the result of give and take, of compromise, of negotiation, of concessions made graciously or grudgingly. Ex: There is little to be said for this grudging acceptance or utter rejection of pseudonyms. Ex: Even if librarians can admit begrudgingly that comic books may deserve a rightful place in many libraries, innumerable fears come to mind = Aunque los bibliotecarios pueden admitir de mala gana que los comics pueden merecerse el lugar que les corresponde en muchas bibliotecas, las dudas que les asaltan son innumerables. Ex: Intellectuals have been unwillingly transformed into cultural commentators and cultural studies has replaced philosophy.