Definitions:

1. A tendency to become grumpy, short-tempered or fretful, especially when things do not go as expected or desired. NOUN
   • The children's peevishness increased as the long car journey dragged on.
2. Refers to a state of being easily irritated, annoyed, or discontented, often over trivial matters. NOUN
   • Her constant peevishness made it difficult to enjoy spending time with her.

Synonyms:

• crankiness
• fretfulness
• fussiness
• impatience
• irritability
• petulance
• surliness
• temper