Introvert
perturb - to annoy. Someone who can be easily annoyed is perturbable, though that word is used very rarely. Someone who can not be easily annoyed is imperturbable.
Gullible
intuitive
Yes, "smiler" is a word. It refers to someone who smiles frequently or easily.
The root word of "gullible" is "gull," which means to deceive or trick someone easily.
You could use 'intractable' meaning not easily controlled or directed
"Hello" is a common greeting used to acknowledge someone's presence or to start a conversation. It is a way to show friendliness and open communication between people.
Människokännare is a person who can easily understand other people better than most others. Someone who can predict the actions and understand the motivations of another.
The word "accessible" refers to something that is easily reached, entered, or used, especially for people with disabilities. It can also describe something that is easily understood or available to a wide range of people.
The word is offend or insult. Both words mean to hurt someone's feelings.
Unsociable
The definition of the word gullible is someone who is naive or easily persuaded to believe or do something. It can also mean they are innocent and a follower.