alertness
/əˈlɝt.nəs/ noun C2- The quality of being alert or on the alert.
Plural alertnesses
From the library
His eyes were sharp and piercing, save during those intervals of torpor to which I have alluded; and his thin, hawk-like nose gave his whole expression an air of alertness and decision.
The lamp beat upon his face, and so intent was it and so still that it might have been that of a clear-cut classical statue, a personification of alertness and expectation.
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