Pronunciation: [kˈʌm ˌʌp ˈɒn] (IPA) 
The spelling of "come up on" is fairly straightforward when using the International Phonetic Alphabet. The first syllable, "come," is pronounced /kʌm/ with a short "u" sound. The second syllable, "up," is pronounced /ʌp/ with a short "u" sound as well. The final word, "on," is pronounced /ɒn/ with a short "o" sound. Together, the word is pronounced /kʌm ʌp ɒn/ and means to approach or reach a destination or topic.
The phrasal verb "come up on" is used to describe the act of reaching or approaching a certain point, location, or situation. It typically implies a gradual or ongoing progression towards a destination or event. The phrase can be used in various contexts, including personal encounters, physical movement, or the occurrence of an anticipated event.
When used in the context of personal encounters, "come up on" refers to unexpectedly meeting someone or stumbling upon them in a particular place or situation. For instance, one might say, "I came up on my old friend at the grocery store."
In terms of physical movement, "come up on" signifies nearing a specific location or point. For example, a traveler may state, "We were driving down the highway when we came up on a stunning picturesque town."
Additionally, "come up on" can describe the anticipation or arrival of a scheduled or anticipated event. For instance, somebody might say, "The concert is coming up on Friday, and I can't wait to see my favorite band perform."
Overall, "come up on" captures the essence of gradually reaching or encountering a certain point, whether physical or metaphorical, and is commonly used in everyday conversations to describe various types of encounters, movements, or events.
