IPA: /ˌspɛk.trəˈskɒp.ɪk/
KK: /spɛktrəˈskɒpɪk/
Related to the study of the interaction between light and matter, often using instruments to analyze the spectrum of light.
The scientists used a spectroscopic method to analyze the chemical composition of the stars.
Spectroscopic → It is formed from "spectro-" (from Greek "spektros", meaning to look or see) and "-scopic" (from Greek "skopein", meaning to look or examine). The word "spectroscopic" refers to the examination or observation of the spectrum of light.
Think of 'looking' ('spectro-') and 'examining' ('-scopic') to remember that 'spectroscopic' means related to the examination of light spectra.