IPA: /nɒnˈstrʌkʧərəl/
KK: /nɑnˈstrʌkʧərəl/
Not related to the physical structure of something; often used to describe elements that do not contribute to the stability or framework of a system.
The nonstructural elements of the building include the interior decorations and furniture.
Nonstructural → It is formed from "non-" (meaning not) and "structural" (from Latin "structura", meaning a building or arrangement). The word "nonstructural" means not related to or not part of a structure.
Think of 'non-' meaning 'not' and 'structural' relating to a 'building' or 'arrangement' — so nonstructural refers to something that is not part of a building.