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v.
disguise by camouflaging; exploit the natural surroundings to disguise something; "The troops camouflaged themselves before they went into enemy territory"
v.
come into being or existence, or appear on the scene; "Then the computer came along and changed our lives"; "Homo sapiens appeared millions of years ago"
v.
jump down from an elevated point; "the parachutist didn't want to jump"; "every year, hundreds of people jump off the Golden Gate bridge"; "the widow leapt into the funeral pyre"
v.
cause to happen, occur or exist; "This procedure produces a curious effect"; "The new law gave rise to many complaints"; "These chemicals produce a noxious vapor"; "the new President must bring about a change in the health care system"