heighten

 
Pronunciation: /ˈhʌɪt(ə)n/

verb

  • 1make or become more intense: [with object]: the pleasure was heightened by the sense of guilt that accompanied it (as adjective heightened) the heightened colour of her face [no object]: concern over CFCs has heightened
  • 2 [with object] make (something) higher: the stage will be extended, heightening the grid by 3.4 metres