Game of Thrones: Season 7 Episode 4: Brienne and Arya (HBO)

Trained describes someone or something that has been taught a particular skill or type of behavior through practice and instruction. It is commonly used to refer to professionals who have completed a specific course of study or animals that have been conditioned to perform tasks.

As a noun, a "master" is a person who has complete control over something or someone, or who is extremely skilled at a particular art, craft, or subject. As a verb, to "master" means to learn a skill or subject completely, achieving full proficiency and control over it.

Arms refers to the two upper limbs of the human body extending from the shoulder to the hand. Additionally, it serves as a collective noun for weapons and ammunition used in warfare, security, or defense.

The regular pulse or rhythm in a piece of music that you can clap your hands or tap your feet to. It is the basic unit of time in a song that helps musicians stay together.