| A | B |
| disease | a condition that results from infection, inherent weakness or pressures from the environment |
| experiment | something done to demonstrate a known fact, to prove a theory, or or to see how well a new thing works |
| discovery | something newly found, observed, or learned of |
| disable | to weaken or destroy the normal capacities or abilities of; cripple;incapacitate |
| international | of or between two or more nations or nationalities |
| dishonest | inclined to lie, cheat, or deceive |
| export | to send or carry goods or products to another country for trade or sale |
| experience | an event or series of events participated in or lived through |
| interrupt | to stop the conversation, speech, or action of someone by breaking in |
| extreme | very great or intense; utmost |
| exhaust | to wear out completely;tire |
| distress | pain or suffering of mind or body resulting from worry, anxiety, or sickness |
| expand | to increase in one or more physical dimensions; to enlarge |
| extent | the scope or range of something |
| disturb | to intrude upon or bother |
| interfere | to intrude upon the affairs of others;to meddle |
| disguise | to conceal the identity of |
| discourage | to make less hopeful or enthusiastic |
| expensive | high priced or costly |
| interview | a face-to-face meeting, especially to obtain information |
| disinfectant | a substance that kills microrganisms that cause disease; antiseptic |
| expertise | expert skill or knowledge |
| intervene | to enter a course of events as to hinder or change it |
| exposure | being exposed or subjected to |
| interdependent | mutually dependent |