অর্থ : The process of paying close and continuous attention.
							উদাহরণ : 
							Wakefulness, watchfulness, and bellicosity make a good hunter.
							Vigilance is especially susceptible to fatigue.
							
সমার্থক : vigilance, wakefulness, watchfulness
অর্থ : A state of readiness to respond.
							উদাহরণ : 
							Alerting was indicated by the desynchronization of the EEG.
							
সমার্থক : alerting
অর্থ : Lively attentiveness.
সমার্থক : on the qui vive, sharp-sightedness