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check – v. to examine something
negative – adj. lacking something
reminder – n. something that causes you to remember something
invisible – adj. unable to be seen
unattractive – adj. unappealing
contract – n. an agreement between people and/or companies (often a legal agreement)
psychologist – n. someone who studies mental states, behavior and emotional or social processes
mode – n. a way in which something is done or experienced
backpack – n. a container or object for carrying things on one's back
chat – n. a light and friendly discussion
