Pronunciation: [pˈast ɪn tuː] (IPA) 
The correct spelling for the phrase "passed in to" is actually "passed into." The sound represented by the letter "s" in "passed" is voiceless, while the sound represented by the letter "s" in "into" is voiced. The combination of these sounds requires the use of the letter "c" to represent the voiced sound, resulting in the spelling "passed into." In IPA phonetic transcription, the word would be pronounced as /pæst ɪntu/.
"Passed in to" is a phrasal verb that refers to the act of entering or moving inside a particular place or location. It typically implies the transition from an outer area or space to an interior space. This phrase can be used both literally and metaphorically, depending on the context in which it is employed.
In a literal sense, "passed in to" suggests physically moving through an entry point, such as a door, gate, or any form of access point, to gain entrance into a specific area. For instance, one might say, "She walked up to the house and passed in to the living room." In this example, "passed in to" implies that the person entered the living room from another part of the house.
In a metaphorical sense, "passed in to" can signify a transition from one state or condition to another. For example, one might describe someone as having "passed in to a deep sleep" or "passing in to madness." In these instances, the phrase portrays a shift from wakefulness to a state of slumber or from sanity to insanity, respectively.
Overall, "passed in to" conveys the idea of crossing a boundary or threshold, whether literal or figurative, to reach a different space or state.
