1. Reaching a higher intensity
   "their heightening fears"

1. Become more extreme
   "The tension heightened"
   - rise 
2. Make more extreme; raise in quantity, degree, or intensity
   "heightened interest" 
3. Increase
   "heighten the tension"
   - enhance, raise 
4. Increase the height of
   "The athletes kept jumping over the steadily heightened bars" 
5. Make (one's senses) more acute
   - sharpen 
6. Make more intense, stronger, or more marked
   "Pot smokers claim it heightens their awareness"
   - intensify, compound, deepen

See also: intensifying

Type of: bring up, elevate, get up, increase, lift, raise

• infrastructure
• infrequency
• infrequent
• infrequently
• infrigidation
• infringe
• infringement
• infringement of copyright
• infructescence
• infundibuliform
• infundibulum
• infuriate
• infuriated
• infuriating
• infuriatingly
• infuriation
• infuscate
• infuse
• infuser
• infusible
• infusion
• Infusoria
• infusorian
• inga
• Inga edulis