IPA: /ˈhoʊliɪst/
KK: /ˈhoʊliɪst/
The most sacred or revered; having the highest level of holiness.
The holiest place in the city attracts many visitors each year.
Holiest → It is formed from "holy" (from Old English *halig*, meaning sacred or consecrated) and the superlative suffix "-est" (meaning most). The word "holiest" means the most sacred or consecrated.
Think of something that is 'sacred' ('holy') and remember that 'holiest' means the most sacred.