piteously
In a piteous manner; pathetically; plaintively.
He had been quite familiar with one old ghost, in a white waistcoat, with a monstrous iron safe attached to its ankle, who cried piteously at being unable to assist a wretched woman with an infant, whom it saw below, upon a door-step.
Where it comes from
From Middle English piteuously, pitously; equivalent to piteous + -ly.
Adapted from the Wiktionary entry piteously (CC BY-SA 4.0).