IPA: /ˈhaɪtənɪŋ/
KK: /ˈhaɪtənɪŋ/
The act of making something higher or more intense.
The heightening of the tension in the movie kept everyone on the edge of their seats.
Heightening → It is formed from "height" (from Old English "hēah", meaning high) and "-en" (a suffix used to form verbs indicating to make or become). The word "heightening" means the act of making something higher or increasing its height.
Think of making something 'high' ('height') and adding 'en' to mean to make it so — that's why heightening means to make something higher.