desultoriness

adjective

1. passing from one thing to another in an aimless way; disconnected; not methodical: a desultory conversation
2. lacking direct relevance; random; incidental: a desultory observation

Origin: L desultorius < desultor, vaulter < desultus, pp. of desilire, to leap down < de-, down, from + salire, to leap: see salient