causeless (adj.)
- accidental
- adventitious
- aimless
- aleatory
- casual
- chance
- chancy
- contingent
- dicey
- fatal
- fluky
- fortuitous
- haphazard
- iffy
- incidental
- indeterminate
- indiscriminate
- inexplicable
- mindless
- promiscuous
- purposeless
- random
- risky
- stochastic
- stray
- unaccountable
- uncaused
- undetermined
- undirected
- unexpected
- unforeseeable
- unforeseen
- unlooked-for
- unmotivated
- unpredictable
As the bird by wandering, as the swallow by flying, so the curse causeless shall not come.