The quality of resembling a rooster; arrogant, swaggering behavior.
From 'cockish' + '-ness' (noun suffix), triple-derived from 'cock' by adding three suffixes in sequence.
Creating 'cockishness' by adding '-ness' to 'cockish' is technically valid but sounds almost absurd—it shows the limits of English word-building, where you can technically create something that follows rules but sounds like nobody would actually say it.
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