desbalancear

Means to throw something off balance, physically or figuratively — desbalancear el presupuesto (unbalance the budget). It's the straightforward opposite of balancear/equilibrar, common in both everyday and financial Spanish.

• El peso extra desbalanceó la balanza. — The extra weight threw off the scale.
• Ese gasto imprevisto desbalanceó el presupuesto familiar. — That unexpected expense threw the family budget off balance.
• No queremos desbalancear la relación entre los dos equipos. — We don't want to unbalance the relationship between the two teams.

In Spain, desequilibrar is more common than desbalancear for the figurative sense — desbalancear is understood everywhere but appears more frequently in Latin American Spanish, especially in financial contexts.

Often confused with balancear.