A statement of fundamental facts or principles.

synonym: rudiments.

Dutch: abc, alfabet, basiskennis

Principles from which other truths can be derived:
— Let's get down to basics.

synonyms: basic principle, bedrock, fundamental principle, fundamentals.

Dutch: basisidee, grondgedachte
Polish: katechizm, ABC, elementarz, abc, podstawy, rudymenty, elementy, abecadło, alfabet