significaban
Imperfect ellos/ellas/ustedes conjugation of significar.

significar

Desde el s. XVII convivieron en su configuración importantes cotos mineros de hierro junto a arrabales residenciales que se significaban por importantes niveles de hacinamiento y, consecuentemente, graves problemas sanitarios.
From the 17th century onwards, important iron mining groups coexisted here with residential suburbs, which meant significant levels of overcrowding and consequent serious health problems.
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