Intruders

Near the door, an elaborate metal robot -- a robot designed to keep away intruders, was standing coldly.

Source: tatoeba (596278)

He bought a guard dog to keep out intruders.

Source: tatoeba (3624780)

Fadil went downstairs to confront the intruders.

Source: tatoeba (5869321)

A bull, stimulated either by the scarlet colour of Miss Ashton's mantle, or by one of those fits of capricious ferocity to which their dispositions are liable, detached himself suddenly from the group which was feeding at the upper extremity of a grassy glade, that seemed to lose itself among the crossing and entangled boughs. The animal approached the intruders on his pasture ground, at first slowly, pawing the ground with his hoof, bellowing from time to time, and tearing up the sand with his horns, as if to lash himself up to rage and violence.

Source: tatoeba (7752127)