IPA: /dɪˈfɔːrmeɪʃənl/
KK: /dɪˈfɔrˈmeɪʃənl/
Related to changes in shape or form, often due to stress or pressure.
The deformational changes in the material were evident after the experiment.
Deformational → It is formed from "de-" (meaning down or away) and "formare" (meaning to shape) combined with the suffix "-tional" (indicating relating to). The word refers to something that relates to the process of changing shape or form, often in a negative way.
Think of 'de-' meaning 'away' and 'formare' meaning 'to shape' — this helps you remember that 'deformational' relates to the process of changing shape.