In an inexplicable manner; for an unknown reason.(adverb)
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Use "inexplicably" in a sentence
"Colonel Gaddafi ignored the popular view that he should consider his position, and hired African mercenaries or "troops loyal to..." in that much-employed phrase that cries out for the word "inexplicably" to be inserted between "troops" and "loyal" to shoot protesters."
"There appears to be a visceral force which galvanizes this rash gambler: upon seeing a car far off into the curve-blighted highway, the machismo gene must kick in and a huge invisible weight inexplicably is poured into his right foot, powering the car ahead at great speed."
"For most of the picture, Wesley Gibson inexplicably is obsessed with avenging the murder of his father, despite the fact that daddy abandoned him when he was seven-days old."