Pronunciation: /ˈlɛtər/
noun a written or printed communication addressed to a person or organization
A1 I received a letter from my friend.
A2 She wrote a letter to her grandmother.
B1 The letter contained important information about the project.
B2 He sent a letter of resignation to his boss.
C1 The letter was written in a formal tone.
C2 The letter was eloquently crafted and persuasive.