1. To a high degree or extent; favourably or with much respect
   "extremely interesting"
   - highly, majorly 
2. To an extreme degree
   "extremely cold"; "extremely unpleasant"
   - exceedingly, super, passing

See also: extreme

• axiomatically
• axion
• axis
• axis of rotation
• axis vertebra
• axle
• axle bar
• axle grease
• axletree
• Axminster
• axolemma
• axolotl
• axon
• axonal
• axone
• axseed
• ay
• ayah
• ayapana
• Ayapana triplinervis
• ayatollah
• Ayatollah Khomeini
• Ayatollah Ruholla Khomeini
• aye
• aye-aye