Pronunciation: [tˈʌt͡ʃɪŋ ˌʌp ˈɒn] (IPA) 
The phrase "touching up on" is a common expression that is often spelt incorrectly. The correct spelling is "touching up on," with the "on" at the end. The word "touching" is pronounced with two syllables /ˈtʌtʃɪŋ/ and the word "up" is pronounced with one syllable /ʌp/. The word "on" is pronounced with one syllable /ɒn/. Together, the phrase means to improve or enhance one's knowledge or skills on a particular subject.
The phrase "touching up on" refers to the act of revisiting or reviewing a particular knowledge or skill with the intention of refreshing or enhancing one's understanding or proficiency in that area. It signifies the process of briefly delving into a subject or activity that one is already familiar with, in order to brush up on the relevant details.
When individuals "touch up on" a subject, they engage in a quick recap or overview of the topic, often to reinforce their knowledge, fill in any gaps, or prepare for a specific task or endeavor. This expression implies that the individuals possess some existing knowledge or experience in the area they are revisiting, and they seek to reinforce or update it.
The phrase "touching up on" can be used in various contexts, ranging from professional to personal. For example, professionals may touch up on industry trends or regulations before participating in a meeting or delivering a presentation. Students may touch up on certain subjects before an examination or completing an assignment. Additionally, individuals may touch up on hobbies or personal interests to improve their skills or deepen their understanding.
Overall, the term "touching up on" signifies the act of briefly revisiting or refreshing knowledge or skills to ensure they remain current, competent, and effective in a particular field or area of interest.
