karthi uthay is an introvert! What do you call someone who keeps their feelings inside? I think the noun introvert or introversion is appropriate, as your friend may choose to keep his emotions unexpressed simply by nature, as a trait of his character. because many people misunderstand and mistreat him being an introvert is bad and damaging he shall stop but no one lets him they will only feel concern until then they will feel happy if he gets illness. anyone on earth + ahmed and his siblings, tulsy, sagnjeevie, uthay, asha, kule, anand, chithi, all!