This is the 9771st most frequent French word.
essayée
"Essayée" means "tried" or "attempted" (feminine singular, past participle of "essayer").
In this sentence, 'essayée' is the feminine singular past participle agreeing with the subject 'Elle', and it's used to describe the act of trying or attempting a recipe.
Elle a essayée une nouvelle recette pour le dîner.
She tried a new recipe for dinner.
Here, 'essayée' agrees in gender and number with 'robe', the direct object preceding the conjugated verb 'a' in the passé composé tense, indicating the act of trying on the dress.
La robe qu'elle a essayée était trop grande.
The dress that she tried on was too big.
'Essayées' agrees with 'les idées', the plural feminine direct object, reflecting the past action of attempting those ideas.