Berry with two diacritics in its name

• Berry advertised as healthful
• Antioxidant-packed berry
• Fruit with as many syllables as vowels
• Much-favored palm fruit
• Smoothie fruit
• Berry used in some smoothies
• ___ powder (smoothie ingredient)
• Berry high in antioxidants
• Tart berry

Wiktionary Word definitions in Wiktionary
n. (alternative spelling of açai English)