accidentado

adj. uneven; broken; hilly; ragged; injured, wounded; upset, troubled; (Caribbean) broken down; (Latin America) hunchbacked, having an abnormally protruding back due to a spinal deformity

n. casualty, injured person

v. have an accident; cause an accident

v. have a seizure; have an accident; (Mexico) crash

= rugged, hilly [hillier -comp., hilliest -sup.], chequered [checkered, -USA].
Ex: Due to their lighter weight optical-fibre cables can be suspended to form aerial cables in the rugged countryside of Wales where the laying of ducts would be prohibitively expensive.
Ex: Having entered the next state and a highway off the turnpike, he was amazed by the extraordinary flatness of the land, especially in contrast to the hilly terrain he had grown up with back home.
Ex: An appraisal of the reforms following the report suggests that local councillors' workload has increased, and community councils have had a chequered career, although local authorities generally are stronger.
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* historia accidentada = chequered history.
* pasado accidentado = chequered history, chequered past.