Chapter 2: ID Waivers 16 $ Understanding the ODP in PA: Intellectual Disability and Autism Services CHAPTER 2: INTELLECTUAL DISABILITY WAIVERS This Chapter is a detailed description of the two waivers available for people with Intellectual Disability.
Di-. a prefix, signifying twofold, double, twice. Di-. denoting two atoms, radicals, groups, or equivalents, as the case may be. See Bi-, 2. Di-. a prefix denoting through; also, between, apart, asunder, across. Before a vowel dia-becomes di-; as, diactinic; dielectric, etc. Origin: [Gr. di`s-twice; akin to two, L. bis twice. See Two, and cf. Bi-, Dia-.
The word prefix contains the prefix pre- (which means before) and the root word fix (which means to fasten or place). Thus the word prefix literally means to place before.. Prefixes are bound morphemes, which means they can't stand alone. Generally, if a group of letters is a prefix, it can't also be a word.