The word "most alarmable" refers to a state or characteristic of being easily alarmed or frightened. Some antonyms or opposite words for "most alarmable" include "calm," "composed," "unflappable," "relaxed," "confident," "fearless," and "unperturbed." These words describe a state of mind or personality that is less prone to panic or anxiety, usually as a result of experience or training. The opposite of being "most alarmable" is being able to keep cool and collected under pressure or in difficult situations without losing your composure. This state of mind is often associated with resilience or emotional intelligence, which can be developed over time through practice and self-awareness.