Cognitive development (for example, if your baby is not becoming more alert or active over time).

Someone has come too close to his children, and the primate male has become alert.

Since things were going so smoothly and he anticipated making love to this woman very soon, his body had become quite alert.

Her expression had slowly become more alert, less exposed.

Almost in the same instant his eyes opened, his brain cleared, became alert.

As a result of being aboard our ship, you have become more alert.

Therefore, different strategies must be implemented to aid students in becoming alert to sounds instead.

Or because the wood-spirit's appearance had pushed him into becoming more alert.

He could see nothing there, but became more alert.

That was their affair, however, and Jiro continued on, merely becoming more alert than before.