hubieran avergonzado
-they/you had embarrassed
Antecopréterito de subjuntivo para el sujeto ellos/ellas/ustedes del verbo avergonzar.

avergonzar

De todos modos, esas familias no podían comprar comidas preparadas y, además, se hubieran avergonzado de servir tal comida.
Those families could not afford prepared foods, but they would have been embarrassed to serve such food in any event.
Palabra del día
la aceituna