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:

Its origins are unknown and may well never be discovered.
If this conjecture is correct, then Italy's delivery percentages could be adjusted upwards (by an unknown amount) towards the predicted value and their mail processing costs would then have to be adjusted downwards.
However, it is also possible that thromboembolic events could have been underdiagnosed due to a low index of suspicion for thromboembolism in chronic dialysis patients, [ 24 25 26 ] because of the high number of deaths with an unknown cause, the low rate of autopsies in this population, or a combination of these factors.
Thus, in this cell line, for unknown reasons the protein could be less stable.
Moreover, in the absence of stable tyrosine phosphorylation as seen in the Src kinase inactive fusions, v-crk could either induce their phosphorylation, or protect transiently phosphorylated YDXP motifs from dephosphorylation through yet unknown mechanisms.