Forming a necessary base or core part of something; basic and essential.
“Access to quality education is fundamental to reducing inequality.”
“Clear communication is fundamental to any successful team project.”
Use 'fundamental' in Speaking Task 7 when describing something you consider a core reason or essential requirement, such as 'Trust is fundamental to any workplace relationship.' This word signals to the rater that you can express abstract, higher-level ideas rather than only simple, concrete ones.
Synonyms: essential, basic, core