Causing worry, fear, or concern; serving as a warning or alarm; disturbing or disquieting in nature.
From 'alarum' (archaic form of alarm) plus '-ing' suffix. This early modern English form appears in 16th and 17th century literature, particularly in dramatic works.
Using 'alaruming' instead of 'alarming' is pure Shakespeare—it's how people actually pronounced and wrote it in the Elizabethan era! Modern editors usually modernize it, but the original spelling shows how language has smoothed over time.
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