Pronunciation: [bˈɜːst ˈɪn] (IPA) 
"burst in" is spelled /bɜːrst ɪn/. The word "burst" is spelled with a "u" because it is pronounced with an "er" sound, which is represented by the symbol /ɜː/ in IPA. The word "in" is spelled with an "i" because it is pronounced with an "ih" sound, which is represented by the symbol /ɪ/ in IPA. Together, the word "burst in" describes the action of suddenly entering a room or a conversation without being invited or wanted.
Burst in is a phrasal verb that typically refers to the sudden and forceful entrance into a space without prior warning or permission. It is an action that involves entering abruptly and forcefully, often with a sense of urgency or impatience.
When someone bursts in, they disregard any existing barriers like closed doors or locked gates, making their entry swift and immediate. The act of bursting in is commonly associated with a loud noise or sudden commotion, as the individual enters with energy and enthusiasm.
This phrase can be used in various contexts, both literal and figurative. In a literal sense, burst in can describe someone forcefully entering a room, building, or enclosed area, often interrupting an ongoing activity or conversation. For example, "He burst in on the meeting, disrupting the entire discussion."
In a figurative sense, burst in can be used to depict a sudden interruption or intrusion in an ongoing situation or process. It implies a lack of consideration for established rules or protocols, causing disruption or agitation. For instance, "The unexpected phone call burst in on her concentration, making it difficult for her to focus on her work."
Overall, burst in is a phrase that denotes a sudden and forceful entrance, typically accompanied by noise or commotion, either literally or figuratively.
The word "burst in" consists of two components: "burst" and "in".
The term "burst" dates back to Old English and derives from the Proto-Germanic word "burstan" which meant "to break open suddenly". This word can be traced further back to the Proto-Indo-European root "bhrst", meaning "to burst, break".
The word "in" comes from Old English "innan", which is akin to the Proto-Germanic word "in" and the Proto-Indo-European root "en". It denotes the sense of movement or action within or into something.
Therefore, "burst in" combines the concept of forceful breaking open suddenly ("burst") with the movement of entering or going inside ("in").
