/ˌsɜːrkəmˈstænʃl/
cir·cum·stan·tial
BrE /ˌsɜːkəmˈstænʃl/
NAmE /ˌsɜːrkəmˈstænʃl/
(law)
containing information and details that strongly suggest that sth is true but do not prove it
circumstantial evidence
The case against him was largely circumstantial.
(formal)
connected with particular circumstances
Their problems were circumstantial rather than personal.