1) Cognitive state 2) Doubt 3) Doubtfulness 4) Dubiety 5) Dubiousness 6) French word used in English 7) State of mind 8) Uncertainty 9) Uncertainty or doubtfulness Found on https://www.crosswordclues.com/clue/incertitude
In·cer'ti·tude noun [ Confer French incertitude , Late Latin incertitudo , from Latin incertus . See Incertain .] Uncertainty; doubtfulness; doubt. « The incertitude and instability of this life.» Holland. « He fails . . . from mere ... Found on http://www.encyclo.co.uk/webster/I/31