unrestrained by convention or morality; "Congreve draws a debauched aristocratic society"; "deplorably dissipated and degraded"; "riotous living"; "fast women"
march aggressively into another's territory by military force for the purposes of conquest and occupation; "Hitler invaded Poland on September 1, 1939"
penetrate or assault, in a harmful or injurious way; "The cancer had invaded her lungs"
occupy in large numbers or live on a host; "the Kudzu plant infests much of the South and is spreading to the North"
foul and run-down and repulsive; "a flyblown bar on the edge of town"; "a squalid overcrowded apartment in the poorest part of town"; "squalid living conditions"; "sordid shantytowns"
spoiled and covered with eggs and larvae of flies; "flyblown meat"; "a sack of maggoty apricots"