Exorbitant (adjective)

1. Exceeding the bounds of what is reasonable or fair.
2. Unusually or excessively high in cost.
3. Going beyond the usual limits; excessive.

Origin:

From latin exorbitans, present participle of exorbitare ("to deviate from the orbit, to depart from the prescribed course, to be excessiv.e")

Examples:

1. The hotel charged exorbitant prices for their rooms.
2. The exorbitant fees made it difficult for many students to attend the school.
3. The exorbitant cost of living made it difficult for many people to make ends meet.
4. He was charged with exorbitant interest on his loan.
5. The company's exorbitant profits were a source of controversy.