basic >> /ˈbeɪsɪk/
Definition: [noun] The essential facts or principles of a subject or skill.
Definition: [adjective] Forming an essential foundation or starting point; fundamental.
Example: certain basic rules must be obeyed
Definition: [adjective] Having the properties of a base, or containing a base; having a pH greater than 7.
Example: these salts yield basic solutions comparable in strength with the mineral alkalis