Absorbed
Part of speech: verb
Definition: To include so that it no longer has separate existence; to overwhelm; to cause to disappear as if by swallowing up; to incorporate; to assimilate; to take in and use up.
Part of speech: adjective
Definition: fully occupied with one's thoughts; engrossed taken in by a body without reflection taken by through the pores of a surface
Attentive
Part of speech: adjective
Definition: paying attention; noticing, watching, listening, or attending closely
Example sentence: Like Cato, give his little senate laws, and sit attentive to his own applause.