Pronunciation: [stˈɛp ˈɪn] (IPA) 
The spelling of the phrase "step in" uses the /st/ consonant blend followed by the short /ɛ/ vowel sound and the /p/ consonant sound. The sound of the letter "e" in "step" is represented by the symbol /ɛ/ in the International Phonetic Alphabet. The letter "i" in "in" is pronounced as the short /ɪ/ vowel sound. This common expression is often used to describe the act of walking into a situation that one was not previously involved in.
The phrase "step in" is a phrasal verb with multiple meanings and applications. In general, it refers to the action of intervening or becoming involved in a situation. Here is a comprehensive 200-word dictionary definition:
1. To intervene or become involved in a situation, typically in order to help or take control. This can include assuming responsibility or taking action when others are unable or unwilling to do so.
2. To enter or interrupt a discussion, debate, or conversation in order to contribute or offer an opinion or advice.
3. In a literal sense, to move into a space or area by taking a step or entering.
4. To begin or initiate a new phase or stage in a process or course of action. This can often imply assuming authority or control over a specific situation or task.
5. In the context of business or job roles, to temporarily take over someone else's tasks or responsibilities during their absence or unavailability.
6. To participate in a competition, event, or activity after someone else has withdrawn or been disqualified.
7. To provide assistance or support to someone who is struggling or experiencing difficulty.
8. In the context of law enforcement or security, to intervene or take action in order to prevent or address a situation that may potentially escalate or become dangerous.
Overall, "step in" encompasses a range of meaning and applications, all revolving around intervention, participation, assistance, control, or interruption in various contexts and situations.
The etymology of the phrase "step in" can be understood by examining the origins and development of its individual words.
1. Step: The word "step" comes from the Old English word "stæpe", which means a "rise" or "action of moving the foot forward". It is related to the Old High German word "stapho" and Dutch word "stap", both meaning "step". The origin of this word is uncertain, but it is believed to be related to the Proto-Indo-European root "*steb(h)-", meaning "to support" or "to stiffen".
2. In: The word "in" is a preposition in English which indicates location or movement within a particular area or space. It comes from the Old English word "inn", which has a similar meaning.
