heighten

verb

1. become more extreme"The tension heightened"
2. make more extreme; raise in quantity, degree, or intensity"heightened interest"
3. increase the level of"This will enhance your enjoyment"
4. increase the height of"The athletes kept jumping over the steadily heightened bars"
5. make (one's senses) more acute"This drug will sharpen your vision"
6. make more intense, stronger, or more marked"The efforts were intensified"