alertness

nouns

the process of paying close and continuous attention
"wakefulness, watchfulness, and bellicosity make a good hunter"; "vigilance is especially susceptible to fatigue"
alertness, vigilance, wakefulness, watchfulness
is derived from
alert
a state of readiness to respond
"alerting was indicated by the desynchronization of the EEG"
alerting, alertness
lively attentiveness
alertness, on the qui vive, sharp-sightedness
is derived from
alert