muggish

Example:He was always alert, ready to take on new challenges.

Definition:Wakeful and attentive; ready for action or response.

Example:The students were energetic, full of enthusiasm for the new lessons.

Definition:Having great energy and enthusiasm; lively and active.

Example:She felt most vigorous during her regular yoga sessions.

Definition:Full of energy and spirit; strong and well; exerting or showing great force or effort.