pohjuste
Pohjuste is a Finnish term that broadly translates to "foundation," "base," or "underlayer." In various contexts, it refers to the essential supporting stratum upon which something else is built or established. The specific meaning of pohjuste is highly dependent on the field in which it is used.
In construction and engineering, pohjuste refers to the ground or sub-base material prepared to support structures
In a more figurative sense, pohjuste can denote the fundamental principles, underlying reasons, or core elements