Sentence examples for are of uncertain from inspiring English sources

(These objects are of uncertain date).

Other hook carvings are of uncertain provenance.

Third, annoyances are of uncertain duration.

Other peoples, especially the Bari, also made figures; these are of uncertain significance.

The Afrīdīs, whose territory straddles the Khyber Pass, are of uncertain origin.

We are clearly going to be more careful with potential large expense streams, which are of uncertain return.

They are of uncertain relationships but may have been distantly related to the cranes and rails (order Gruiformes).

The name Beehive is of uncertain but more recent origin.

The class Dinophyceae is of uncertain origin and is taxonomically contentious.

The prehistoric people of Bohemia, north of the middle Danube River, were of uncertain origin.

The English word Easter, which parallels the German word Ostern, is of uncertain origin.