fundamental
adjective
uk/ˌfʌndəˈmentəl/ us FINANCE, ECONOMICS
used to describe the basic causes of changes in the value of shares, etc. that relate to the condition of companies and the economy:
Fundamental factors will have the most impact on currency.
Compare
technical adjective
very important and basic:
fundamental in/to sth The multilateral trading system has been fundamental in economic success.
There is no need to change anything fundamental about the way the business works.