IPA: /nɒnˈrɛsɪprəkl/
KK: /nɑnˈrɛsɪprəkl/
Describing a situation where something is not given or returned in a similar way or manner.
The relationship was nonreciprocal, as one person always gave more than the other.
Nonreciprocal → It is formed from "non-" (meaning not) and "reciprocal" (from Latin "reciprocus", meaning returning or mutual). The word describes a situation that is not mutual or does not involve a return of favor or action.
Think of 'not' ('non-') being involved in a 'mutual exchange' ('reciprocal') — that's why nonreciprocal means there is no mutual return.