American Oxford Thesaurus
fundamentals
fundamentals plural noun the fundamentals of the job: basics, essentials, rudiments, foundations, basic principles, first principles, preliminaries; crux, crux of the matter, heart of the matter, essence, core, heart, base, bedrock; informal nuts and bolts, nitty-gritty, brass tacks, ABC, meat and potatoes.
Oxford Thesaurus
fundamentals
fundamentals plural noun he taught me the fundamentals of the job: basics, essentials, rudiments, foundations, basic principles, first principles, preliminaries; crux, essence, core, nucleus, heart, base, bedrock, groundwork, crux of the matter, heart of the matter; Latin sine qua non; informal nuts and bolts, nitty-gritty, brass tacks, ABC. ANTONYMS advanced principles.
Duden Dictionary
Fundamentalsatz
Fun da men tal satz Substantiv, maskulin , der |Fundament a lsatz |grundlegender Lehrsatz der Fundamentalsatz der Algebra