something that causes delay or stops progress

a particular part or quality of someone or something that is not good or effective

  a time of great disagreement, confusion, or suffering

   a person, team, or company that is competing against others

a feeling of energetic interest in a particular subject or activity and an eagerness to be involved in it

  to experience or show the effects of something bad

   To accept, admit, or recognize something, or the truth or existence of something

  To introduce something new such as a product

   to continue to have; to keep in existence, or not allow to become less

conversation about things that are not important, often between people who do not know each other well

  the ability to do things that need a lot of physical or mental effort

  a person who formally requests something, especially a job or to study at a college or university

an occasion when you make something better

   to do an action or piece of work