This is the 9456th most frequent French word.
dout
It seems "dout" is not a standard French word. You might mean "doute," which translates to "doubt" in English.
In this sentence, 'doute' is used as a verb to express uncertainty or lack of belief about a future event.
Je doute qu'il vienne à la fête ce soir.
I doubt that he will come to the party tonight.
Here, 'doute' is used as a noun to indicate absence of uncertainty or skepticism regarding someone's sincerity.
Il n'y a aucun doute sur sa sincérité.
There is no doubt about his sincerity.
In this example, 'doutes' serves as a plural noun to represent multiple instances of uncertainty or hesitations that the detective faced.