infrastructure – n. the basic equipment and structures (such as roads and bridges) that are needed for a country, region, or organization to function properly

strain- v. a feeling of stress and worry that you have because you are trying to do too much, are dealing with a difficult problem

fatigue – n. the state of being very tired : extreme weariness

pharmaceutical – n. of or relating to the production and sale of drugs and medicine

coupon – n. a usually small piece of printed paper that lets you get a service or product for free or at a lower price