Synonym: cryptically, enigmatically. Similar words: mysterious, furiously, curiously, notoriously, laboriously, precariously, deleterious, mystery. Meaning: [mɪ'stɪrcslɪ /-'stɪr-] 
adv. in a cryptic manner.
adv. in a cryptic manner. 91. In 1934, Fard mysteriously disappeared and the apostle, now called Elijah Muhammad, took command of the Nation of Islam.
More similar words: mysterious, furiously, curiously, notoriously, laboriously, precariously, deleterious, mystery, obviously, dubiously, anxiously, copiously, previously, voraciously, judiciously, consciously, avariciously, serious, hysteria, subconsciously, imperious, hysterics, hysterical, surreptitiously, hysterically, sententiously, nervously, raucously, piteously, sensuously.