A big part of building vocabulary is when a familiar word is used in an unfamiliar way. “Moot” is a good example. I have always seen it used as in “the question is moot,” and I always assumed it meant “irrelevant,” but this is only one definition.
It can be used in various ways, even as a verb, and its meaning then is “questionable,” implying it is still unsettled. The example I faced was, “the question has been mooted by Congress . . .” Oops, maybe I don’t know the meaning after all. In this case, it did not mean “irrelevant,” but “held for further debate.” They may eventually determine it is irrelevant, but the question has not been decided yet.