Words similar to unable

Example sentences for: unable

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

We were also unable to amplify those genes using gene-specific primers by RT-PCR.
On October 29th, a BBC Radio Scotland program was running a competition in which people calling in were asked to spell ventriloquist and kibbutz (among other words, presumably); several callers with “older” voices—they certainly were not children—were unable to do so; does that mean that the Scots are to be excepted from the QES campaign “to compel all children to study formal grammar up to the age of 16” or that the rot set in long ago?
In some cases, the project team may be unable to complete a project on time due to an unrealistic schedule.
The morphology of both cell lines was similar to cells committed to cell differentiation; however, these mammary cells grown on plastic dishes were unable to differentiate by SAHA.
It's ironic, too, that critics such as MacGregor persist in seeing Darger as an unself-conscious obsessive, unable to separate his life from his created fantasy world, since in fact Darger's work is full of precisely the sort of self-referentiality that in a contemporary insider artist would be read as a rather ordinary example of postmodern detachment.