Pronunciation: [tˈʌt͡ʃɪŋ əpˌɒn] (IPA) 
The phrase "touching upon" is spelled with the letter combination "ch" which can be pronounced in different ways depending on the word. In this case, the "ch" is pronounced like the "tch" in "catch". The rest of the word is straightforward with the "o" sounding like "uh" as in "duh", and the "ing" ending pronounced with the "ng" sound. This phrase means to briefly mention or bring up a topic.
The phrase "touching upon" is an idiomatic expression used to describe briefly or briefly discuss a particular subject or topic. When someone "touches upon" a subject, they make a passing or cursory mention of it without entering into great detail or elaboration. It implies a surface-level or introductory level of exploration or examination.
The phrase often indicates that the speaker or writer is not delving deeply into the matter at hand but is instead acknowledging its existence or relevance in a conversation or piece of writing. It suggests that the subject is being mentioned in passing, without going into extensive analysis or in-depth discussion.
"Touching upon" signifies a brief interaction with a topic and can be used to indicate that further exploration or discussion may be needed to fully comprehend or address the subject matter. This phrase is often employed when a speaker or writer wants to give a general idea or context without getting into the specifics or intricacies of a particular subject.
In summary, "touching upon" refers to a concise or fleeting mention or discussion of something, typically used when the broader focus is on a different topic or when the intention is simply to acknowledge the subject's existence without significant exposition or analysis.
The phrase touching upon can be divided into two parts: touching and upon.
The word touching is derived from the Old French term touchier, which can be traced back to the Latin word tangere, meaning to touch. Over time, the term evolved to include various figurative meanings, such as to affect, to move emotionally, or to concern.
The word upon primarily originates from the Old English term uppan, which is a combination of up (meaning on or to) and on (indicating position or direction). The term upon has remained relatively unaltered in its meaning throughout history.
Therefore, when combined, touching upon can be interpreted as touching or affecting in relation to, briefly mentioning or discussing, or bringing up or raising as a topic for consideration.
