1. In a petulant manner
   - testily, petulantly, pettishly, waspishly, crabbily 
2. In an irritable manner
   "she had become irritably exact"

See also: irritable

• island of Guernsey
• island of Jersey
• island-dweller
• islander
• islands of Langerhans
• islay
• isle
• Isle of Jura
• Isle of Man
• Isle of Skye
• Isle of Wight
• Isle Royal National Park
• isles of Langerhans
• Isles of Scilly
• islet
• islets of Langerhans
• ism
• Ismaili
• Ismailian
• Ismailism
• ISN
• isn't
• iso-
• isoagglutination
• isoagglutinin