Basically, you become a quiet and reserved person by speaking less, and you can speak less by asking yourself, before you speak, whether it is really necessary to say whatever it is that you are about to say. Since (chances are) most people would rather hear themselves speak than hear you speak, let others speak, and just listen. They will enjoy having you as a member of their audience.
Basically, an introvert is a person who is reserved, quiet, and solitary
"Reservado" in Spanish can mean "reserved" or "quiet." It can refer to a reserved or quiet person, or be used to indicate that something is being saved or set aside for a specific purpose.
Quiet and nonspoken
I wil communicate with that person more
A person doesn't become autistic and being quiet doesn't make someone autistic - a person is born autistic.
Close-mouthed, close-lipped, quiet, silent, shy, reserved.
A reserved seat on a train, is a seat that you have booked in advance, and which is kept free for your use only. Reserved could also mean a person that is quiet and unlikely to push themselves forward.
A word that means quiet in character is "reserved."
Shy Quiet Loner Introvert Asocial
Silent, quiet, shy
The phrase "no, he's as quiet as quiet can be" conveys a mood of calmness or tranquility, suggesting a serene and peaceful atmosphere. It implies a sense of stillness, indicating that the person in question is not only quiet but perhaps also introspective or reserved. This mood can evoke feelings of solitude or contemplation.
quiet, reserved, and relaxed.