Definition of "grumblingly"

But they went off disappointed, and grumblingly.

1851, Henry Rowe Schoolcraft, Personal Memoirs Of A Residence Of Thirty Years With The Indian Tribes On The American Frontiers‎

This threat being dramatically capped by the click of a cocking pistol, 'Frisco Kid obeyed and went grumblingly back to the cockpit. "

1902, Jack London, The Cruise of the Dazzler‎

Amy grumblingly agreed to give the stream another chance to behave itself.

1915, Ralph Henry Barbour, Left Tackle Thayer‎

He looked down at her, and her eagreness softened him, so that he took her by the hand and said grumblingly, 'Oh well, if it means so much to you, come along.'

1956 , Johanna Spyri, Heidi, translation of original by Eileen Hall, page 78