lingering

To stay or remain in a place or situation, especially as if unwilling to depart or not easily able to do so; to loiter.

To remain alive or existent although still proceeding toward death or extinction; to die gradually.

(often followed by on) To consider or contemplate for a period of time; to engage in analytic thinking or discussion.

An act of lingering or waiting.

That which lingers; a remnant.