1. In a harmfully insidious manner
   "these drugs act insidiously"
   - perniciously

See also: insidious

• bestrew
• bestride
• bestseller
• bestubbled
• besuited
• bet
• bet on
• beta
• beta blocker
• beta blocker eyedrop
• beta cell
• Beta Centauri
• Beta Crucis
• beta decay
• beta endorphin
• beta globulin
• beta iron
• Beta Orionis
• beta particle
• beta radiation
• beta ray
• beta receptor
• beta rhythm
• beta software
• beta test