IPA: /ˌsʌbˈseɪʃən/
KK: /sʌbˈseɪʃən/
The state of having less than a full amount of something, especially in terms of saturation.
The subsaturation of the soil affected the growth of the plants.
Subsaturation → It is formed from "sub-" (meaning under or below) and "saturatio" (from Latin, meaning saturation or the act of filling). The word describes a state of being below the level of saturation.
Think of being 'under' ('sub-') the level of 'filling' ('saturatio') — that's why subsaturation means a state of being less than fully saturated.