ungratuitous

adjective

1. given, done, bestowed, or obtained without charge or payment; free; voluntary.
2. being without apparent reason, cause, or justification: a gratuitous insult.
3. Law. given without receiving any return value.

adjective

1. given or received without payment or obligation
2. without cause; unjustified
3. law given or made without receiving any value in returna gratuitous agreement

adj.1650s, “freely bestowed,” from Latin gratuitus “done without pay, spontaneous, voluntary,” from gratus “pleasing, agreeable,” from gratia “favor” (see grace). Sense of “uncalled for, done without good reason” is first recorded 1690s.