entrecruzaban
-they were interweaving
The word entrecruzaban is the imperfect form of entrecruzar in the third person plural.
See the full entrecruzar conjugation

entrecruzar

Todos estos sonidos se entrecruzaban y yo percibía un ritmo entre ellos.
All these sounds crisscrossed into each other, and I would hear rhythm in between.
Muchos senderos se entrecruzaban en las faldas de la montaña.
The flanks of the mountain were crisscrossed with many paths.
Los rayos de luz roja y blanca se entrecruzaban y creaban un efecto asombroso.
Beams of red and white light crisscrossed creating an amazing effect.
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