The quality or state of being crabby; grumpiness or irritability.
Noun formed by adding -ness to the adjective 'crabby,' creating an abstract noun describing the quality or state.
Notice how 'crab' becomes 'crabbed' (adjective), 'crabbiness' (noun), and 'crabbily' (adverb)—this is called a word family, and it shows how English creates elaborate systems of related words.
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