aguerrido
adj.
veteran, experienced, seasoned
aguerrido
= tough [tougher -comp., toughest -sup.], gallant.
Nota: Adjetivo.
Ex: As educators, then, we need to ask ourselves some very tough questions -- some to which we would rather not hear the answers.
Ex: This was an untenable state of affairs and he made a gallant effort to secure librarians and library boards from the possibility of such suits.