1) Equivocal 2) French word used in English 3) Indecisive 4) Indeterminate 5) Lacking a definite result 6) Neck and neck 7) Nip and tuck 8) Nisi 9) Not conclusive 10) Undetermined 1) Iffy 2) Indeterminate 3) Nisi 4) Unconcluding 
• (a.) Not conclusive; leading to no conclusion; not closing or settling a point in debate, or a doubtful question; as, evidence is inconclusive when it does not exhibit the truth of a disputed case in such a manner as to satisfy the mind, and put an end to debate or doubt.
In`con·clu'sive adjective Not conclusive; leading to no conclusion; not closing or settling a point in debate, or a doubtful question; as, evidence is inconclusive when it does not exhibit the truth of a disputed case in such a manner as to satisfy the mind, and put an end to debate or doubt. �...
[adj] - leading to no final results or outcome 2. [adj] - not conclusive
adjective leading to no final results or outcome; `an inconclusive experiment`
not conclusive; not resolving fully all doubts or questions: inconclusive evidence. · without final results or outcome: inconclusive experiments.