(v) to make something dirty or harmful

(adj) necessary because it is an essential part of something

(n) the process of the body taking nutrients from food

(v) to keep something within a certain area

(adj) happening or existing in all parts of a country

(adj) necessary because someone in authority says you must

(adj) hard-working in a careful and thorough way

(adj) possible, able to be done

(adj) hopeful about the future or the success of something

(n) one of the first people to do something

(adj) having a bad reaction to eating or touching a substance

(n) a fight or conflict

(adj) behaving in a way that is accepted as normal in a society

(v) to reduce in size, importance, or intensity

(n) the part of a cell in a living thing that controls its physical characteristics, growth, and development

(adj) nevertheless

(n) the process of the process of eating healthy food for living and growing

(n) an insect or other small animal that damages crops

(n) a very great change in the way that something is done or made

(n) a person who has doubts about things that other people believe

(n) someone you work with, especially a professional

(n) an object that has been invented for a particular purpose

(n) a clear difference or imbalance; a space between two things

(adj) occurring in small stages over a long period, not sudden

(n) an accurate and deep understanding of something

(adv) nevertheless, in spite of a situation

(v) to copy something, to produce offspring

(n) something that is very difficult to understand

(adj) standing or pointing straight up

(adj) necessary or very important

(n) a pleasant situation you think about and want to happen

(v) to expect and believe that something will happen

(adj) open and willing to cooperate

(n) a tiny amount or proportion of the whole

(n) the force that causes things to drop to the ground

(adj) relating to the armed forces of a country

(adj) moveable

(adj) firm, stiff, and infllexible

(v) to hang something from a high place

(adv) because of that

(n.) a person in charge of a government department

(n.) a group of people working together

(prep. phrase) as a representative of someone or for the benefit of others

(v.) to consist of or include parts

(v.) to go faster and faster

(adj.) short in amount or length of time

(adj.) using physical force or weapons to injure or kill other people

(n.) a long and difficult attempt to overcome problems

(adj.) kind, willing to give more time or money than expected

(n.) story