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Pettish
Slight Irritation
'Pettish' implies a minor annoyance or irritability, not extreme anger. 
Common Misuse
Do not confuse 'pettish' with 'petty.' 'Pettish' describes behavior, 'petty' often describes actions or things. 
Mood Context
Use 'pettish' to describe temporary moods or attitudes, not someone’s overall personality. 