feeling or expressing regret or sorrow or a sense of loss over something done or undone; "felt regretful over his vanished youth"; "regretful over mistakes she had made"; "he felt bad about breaking the vase"
a radical who employs terror as a political weapon; usually organizes with other terrorists in small cells; often uses religion as a cover for terrorist activities
characteristic of someone who employs terrorism (especially as a political weapon); "terrorist activity"; "terrorist state"