Words similar to unknown

Example sentences for: unknown

How can you use “unknown” in a sentence? Here are some example sentences to help you improve your vocabulary:

And it is far from unknown to have to reverse back down and around these bends, allowing other vehicles to pass.
Two of the Meloidogyne genes revealed by our filters, which encode an L-threonine aldolase gene (MI01644) and a deduced protein of unknown function (MI00109), exhibit striking amino-acid identity to rhizobial proteins (48% and 51% respectively), but a complete absence of meaningful homology with any eukaryotic sequence (Table 3).
Survival of pathogenic mycobacteria is attributed to the fact that the mycobacterial phagosome does not fuse with lysosomes [ 4 5 6 ] . The mechanism that prevents phagosome maturation is still unknown as are any mycobacterial genes that contribute to the delayed maturation.
Why the generation of anthranilate under these conditions would be of value is unknown, but phylogenetic trees clearly show phnA/phnB to be xenologs originating from the enteric lineage via LGT (G.X.
(In "," William Saletan explains how the WTO went from complete unknown to boogeyman, and in "," Paul Krugman argues that the WTO's opponents have it all wrong.)