IPA: /nɒnˈbɒndɪŋ/
KK: /nɑnˈbɑndɪŋ/
Describing a state where there is no bonding or connection between atoms or molecules.
The nonbonding electrons in the molecule do not participate in chemical bonding.
Nonbonding → It is formed from "non-" (meaning not) and "bonding" (from the root "bond" which comes from Old English "bonda", meaning to bind or tie). The word "nonbonding" refers to a state where there is no binding or connection between elements or entities.
Think of 'not' ('non-') being involved in 'binding' ('bonding') — that's why nonbonding means there is no binding or connection.