a precautionary measure warding off impending danger or damage or injury etc.; "he put an ice pack on the injury as a precaution"; "an insurance policy is a good safeguard"; "we let our guard down"
completely lacking nobility in character or quality or purpose; "something cowardly and ignoble in his attitude"; "I think it a less evil that some criminals should escape than that the government should play an ignoble part"- Oliver Wendell Holmes, Jr.
not of the nobility; "of ignoble (or ungentle) birth"; "untitled civilians"
lacking even the rudiments of courage; abjectly fearful; "the craven fellow turned and ran"; "a craven proposal to raise the white flag"; "this recreant knight"- Spenser
giving offense to moral sensibilities and injurious to reputation; "scandalous behavior"; "the wicked rascally shameful conduct of the bankrupt"- Thackeray; "the most shocking book of its time"
characterized by unrest or disorder or insubordination; "effects of the struggle will be violent and disruptive"; "riotous times"; "these troubled areas"; "the tumultuous years of his administration"; "a turbulent and unruly childhood"