frustrating – adj. causing feelings of annoyance or anger
invert – v. to change the position, order, or relationship of things so that they are the opposite of what they had been
positive – adj. explicitly stated or expressed
negative – adj. expressing denial or refusal
feature – n. an interesting or important part, quality or ability
mileage – n. the average number of miles a vehicle will travel on a gallon of gasoline
mural – n. a usually large painting that is done directly on the surface of a wall