taxing (adj.)

• accusing
• blame
• burdensome
• clamant
• clamorous
• count
• crying
• demand
• demanding
• draft
• draining
• duty
• exacting
• exigent
• exorbitant
• extortionate
• grasping
• grievous
• importunate
• insistent
• instant
• loading
• loud
• oppressive
• order
• persistent
• pertinacious
• pressing
• pressure
• rack
• rush
• straining
• stretch
• suit
• tedious
• tension
• tough
• troublesome
• trying
• urgent
• warning
• wearing
• weighty