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treacherously
01
farligt, bedrägligt
in a highly dangerous or risky manner
Example
The river flowed treacherously fast, creating dangerous currents for swimmers.
The icy road conditions made driving treacherously slippery and hazardous.
The mountain trail led treacherously along narrow cliff edges, requiring careful navigation.
02
förrädiskt, svikligen
in a disloyal and faithless manner
