basics

/B EY1 S IH0 K S/
noun
  1. 1

    A necessary commodity, a staple requirement.

    โ€œRice is a basic for many Asian villagers.โ€

  2. 2

    An elementary building block, e.g. a fundamental piece of knowledge.

    โ€œArithmetic is a basic for the study of mathematics.โ€

  3. 3

    Basic training.

    โ€œThe drill sergeants gave him hell in basic.โ€

Source: https://en.wiktionary.org/wiki/basic, https://en.wiktionary.org/wiki/basics