The state or quality of being free from irritation; the absence of annoyance or discomfort.
From Latin 'ab-' (away from) + 'irritation,' forming a noun that describes the opposite condition of being irritated—a concept especially valued in medicine and psychology.
In the 18th and 19th centuries, philosophers and doctors were obsessed with naming opposite states of things; 'abirritation' was their technical way of discussing peace of mind scientifically.
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