Pedantic terms refer to words that are excessively technical or academic, often used to show off one's knowledge. The correct spelling of this phrase is /pəˈdæntɪk tɜːms/, with the stress on the second syllable in "pedantic" and the first syllable in "terms". The "a" in "pedantic" is pronounced with the "schwa" sound, which is an unstressed and neutral vowel sound. The "ɜː" in "terms" is a long "er" sound that is commonly used in British English.
The word "pedantic" originated from the Latin word "paedanticus", which was derived from the Greek word "paideia" meaning "education" or "instruction". In ancient Greece, a "pedagogue" was a slave who accompanied young boys to school and was responsible for their education. The word "terms" refers to specialized vocabulary or language used within a particular field or discipline. Hence, "pedantic terms" refers to the use of overly precise, academic, or technical language.