IPA: /ˌɪn.səˈleɪ.ʃən/
KK: /ɪnˈsoʊleɪʃən/
The amount of sunlight that reaches a surface, often measured to understand its effects on temperature and climate.
The insolation levels in the desert are much higher than in the forest.
Insolation is formed from "in-" (meaning into) and "sol" (from Latin "sol", meaning sun) and "-ation" (a suffix indicating a process or action). The word refers to the process of receiving sunlight, particularly the amount of solar radiation reaching a given area.
Think of 'into' ('in-') and 'sun' ('sol') to remember that insolation means the process of receiving sunlight.