Into is a preposition expressing movement to a point within something; a change from one state, form, or condition to another; or involvement or interest in something.
What Does Into Mean?
Into comes from Old English into, formed by combining in and to. It has been part of English for over a thousand years and remains essentially unchanged in both spelling and core meaning. The word appears in the top 100 most frequent words in English, which makes it essential for learners at every level.
The preposition has three main senses. The first and most fundamental is movement towards the inside of an enclosed space or area: She walked into the classroom. The second is change of state or form, used with verbs such as turn, change, translate, and develop: The tadpole turned into a frog. The third, more informal sense expresses interest or involvement: He is really into photography.
A fourth, more technical use appears in arithmetic: Four into twenty goes five (20 ÷ 4 = 5). This use is mainly spoken British English.
Etymology Note
Old English into is a compound of in (indicating position inside) and to (indicating direction towards). The combination created a word that specifies not merely being inside something, but the act of moving or passing inside it. Related forms exist across the Germanic languages: Dutch in, German in + zu. The preposition has remained syntactically stable throughout Middle and Modern English, acquiring the informal "interest" sense only in 20th-century colloquial speech.
Example Sentences
| Sentence | Level & usage note |
|---|---|
| She walked into the classroom and sat down. | A2 — movement into an enclosed space |
| He put his phone into his pocket and left the room. | B1 — movement of an object into a container |
| The project slowly turned into a full-time job. | B1 — change of state over time |
| The company decided to expand into new overseas markets. | B2 — figurative movement into a new area |
| The government launched an inquiry into the causes of the financial crisis. | C1 — formal investigation directed at a topic |
Collocations
| Collocation | Example |
|---|---|
| walk into | She walked into the office without knocking. |
| turn into | The discussion turned into a heated argument. |
| run into | I ran into an old friend at the supermarket. |
| look into | The manager agreed to look into the complaint. |
| get into | She got into university on her first application. |
| break into | The thieves broke into the warehouse overnight. |
| translate into | The novel has been translated into thirty languages. |
| divide into | The teacher divided the class into four groups. |
| crash into | The cyclist lost control and crashed into a parked car. |
| inquire into | The police are inquiring into the circumstances of the accident. |
Usage Notes
Into vs in: Use into when there is movement towards the inside of something. Use in for a static position. Compare: She is in the kitchen (location) vs She went into the kitchen (movement).
Into vs in to (two words): When in is an adverb and to introduces an infinitive or belongs to a following phrase, write them as two separate words: She came in to collect her post (= came in, in order to collect). A useful test: if you can replace the combination with in order to, write two words.
Register: Be into something (= be keen on / interested in) is informal and suits conversation and informal writing. Avoid it in formal essays or academic reports; use have a strong interest in or be interested in instead.
Common Mistakes
Watch Out For
She came into to help me. (double preposition — incorrect)
She came in to help me. (in = adverb, to = infinitive marker)
He is in the room when I entered. (static position used where movement is intended)
He was already in the room when I entered. / I entered into the room. → I walked into the room. (movement = into)
The water changed to ice into minutes. (confusing into with in for time expressions)
The water changed into ice in minutes. (into = change of state; in = within a period of time)