[{"Bold_text": "noun", "List Items": ["the bottom or base anything; the part on which something stands or rests.", "anything upon which something is based; fundamental principle; groundwork.", "the principal constituent; fundamental ingredient.", "a basic fact, amount, standard, etc., used in making computations, reaching conclusions, or the like:The nurse is paid on an hourly basis. He was chosen on the basis of his college grades.", "Mathematics.a set of linearly independent elements of a given vector space having the property that every element of the space can be written as a linear combination of the elements of the set."]}]