1. To an unimaginable extent
   - unimaginably

See also: unthinkable

• overshoot
• overshot
• overside
• oversight
• oversimplification
• oversimplify
• oversize
• oversized
• overskirt
• oversleep
• oversolicitous
• oversoul
• overspecialise
• overspecialize
• overspend
• overspill
• overspread
• overstate
• overstated
• overstatement
• overstay
• oversteer
• overstep
• overstock
• overstrain