drupe
Borrowed from Ancient Greek δρῠ́ππᾱ (drŭ́ppā, “olive”), elliptic form of δρῠ́πεπᾰ (ἐλαίᾱ) (drŭ́pepă (elaíā), “ripe olive”), from δρῠοπέτης (drŭopétēs), δρῠπεπής (drŭpepḗs), δρῡ́πεψ (drū́peps, “fully ripe”, literally “ripened on a tree”), from δρῦς (drûs, “tree”) + πεπ- (pep-, “to ripen”) + -ής (-ḗs, forming adjectives).
Practice speaking and memorizing "drupa" and many other words and sentences in Latin.