What do you mean by colloquial words
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Colloquial, conversational, informal refer to types of speech or to usages not on a formal level and as if it meant “vulgar” or “bad” or “incorrect” usage, whereas it is merely a familiar style used in speaking and writing.

colloquial refers to words or expressions used in ordinary language by common people. An example of colloquial is casual conversation where some slang terms are used and where no attempt is made at being formal.

Explanation:

a) a master's degree

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