Godan verb with 'ku' ending, Intransitive verb
to move off (into the distance); to become distant; to recede; to fade away; to die away
太鼓の音は遠のいていった。The drum faded away. to drift away (from a person, activity, etc.); to distance oneself (from); to become less frequent (e.g. of visits); to fall away (e.g. of customers)
Also written 遠退く【とおのく】