Preposition: used to show that something is inside or within something else. It can also show a state, condition, or time. As an adjective or adverb, it can mean fashionable or present.
From Old English 'in' with the same meaning, related to German 'in' and Latin 'in'. It is one of the oldest and most basic words in the Indo-European language family.
This tiny word does huge work: it can talk about space (in the box), time (in 2020), and even fashion (what’s in right now). Its very simplicity is what lets it attach to so many ideas and idioms.
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