The functions of reduplication are iteration, intensity and attenuation. The exact meaning depends on the lexeme in question and often on the context of the word.
Source: Chaudenson 1974: 1048
Source: Chaudenson 1974: 1048
Source: Chaudenson 1974: 1049
Source: Chaudenson 1974: 1049
Source: Chaudenson 1974: 1049