The genitive with substantives denotes in general a connection or dependence between two words. This connection must often be determined (1) by the meaning of the words, (2) by the context, (3) by the facts presupposed as known ( cross1301). The same construction may often be placed under more than one of the different classes mentioned below; and the connection between the two substantives is often so loose that it is difficult to include with precision all cases under specific grammatical classes.
a. The two substantives may be so closely connected as to be equivalent to a single compound idea: τελευτὴ τοῦ βίου ‘life-end’ (cp.
b. The genitive with substantives has either the attributive ( cross1154), or, in the case of the genitive of the divided whole ( cross1306), and of personal pronouns ( cross1185), the predicate, position ( cross1168).
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].