A feeling of stress is tension, or anxiety. To form tension, you need to change 2 letters.
Anxiety
tension
Putting a message into a secret form by changing words or letters, or substituting numbers for letters.
Inventive.
Inventive
Your're looking for the word suffix.
Hauteur or disdain
Sensation is the medical term meaning feeling.
A prefix is the letters that are placed before the root word, changing the meaning of the word. The prefix "un" placed before equal changes the meaning of the word to a negative connotation, making it "not equal."
the meaning of friendly letters is to recognize the people that write the paragraph
the answer is "senti" meaning "feeling" in French!
to have a feeling to vomit
Euphoria is the medical term meaning exaggerated feeling of well-being.
Anesth- is the medical terminology combining form meaning condition of not feeling.