Resembling a fortress in shape or impregnability. (adjective)
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Use "fortresslike" in a sentence
"In a cramped conference room known as the "submarine" inside the fortresslike New York Fed, more than a dozen employees who constituted the institution's AIG task force were working marathon days, crammed elbow to elbow around a long wooden conference table."
"Hoping for a miracle, they have come to the forbidding, fortresslike Peck Clinic, whose doctors claim to have “resurrected” other patients who were lost in the void."
"Angry demonstrators filled the streets and city squares surrounding Cairo's fortresslike ministry of interior, which oversees the police, chanting against Egypt's interim ruling military regime and lobbing rocks at police."