habían achacado
-they/you had attributed
Past perfectellos/ellas/ustedesconjugation ofachacar.

achacar

Buscaron a sus amigos, que habían achacado su desaparición al hecho de haber pedido prestado dinero y no tener con qué devolverlo.
His friends were looked up, and they put his disappearance down to the fact that he had borrowed some money and could not pay it back.
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