Alphabetic I
irritate - To make someone angry, or annoyed; or to make apart of your body sore or painful.

After the mother spent hours peparing the Friday night meal, she was irritated when the whole family ate quickly and left without thanking her or even saying anything in appreciation.
inhibitions - A feeling of self-consciousness or restraint that prevents someone from acting freely; a psychological or social barrier that limits a person’s behavior or expressions.

His inhibitions kept him from speaking up during the meeting, even though he had great ideas.