had been complicating
-había estado complicando
Past perfect progressiveconjugation ofcomplicate.There are other translations for this conjugation.

complicate

Dovin counted on his fingers—there was the younger Nalaar, of course, who had been complicating the range of potential outcomes since her arrival on the plane.
Dovin contó con los dedos. Primero estaba la joven Nalaar, por supuesto, quien había complicado los posibles desenlaces desde su llegada al plano.
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