This is the 1908th most frequent German word.
zweifel
"Doubt"
In this sentence, "Zweifel" is used to express uncertainty or lack of trust regarding someone's abilities.
Ich habe Zweifel an seinen Fähigkeiten.
I have doubts about his abilities.
Here, "Zweifel" is used to emphasize certainty about the solution, negating any uncertainty.
Ohne Zweifel ist das die beste Lösung.
Without a doubt, this is the best solution.
"Zweifel" here indicates that the person is experiencing doubt or uncertainty due to an external influence.