DOUBT
a status between belief and disbelief, involves uncertainty or distrust or lack of sureness of an alleged fact, an action, a motive, or a decision. Doubt brings into question some notion of a perceived "reality", and may involve delaying or rejecting relevant action out of concerns for mistakes or faults or appropriateness. Some definitions of doubt emphasize the state in which the mind remains suspended between two contradictory propositions and unable to assent to either of them

I try to be more conceptual in this one...
I try to symbolize the meanig of doubt with the expression of the women in center who cover by the red circle as represent the doubt it self..
and i put some word as the expression that related with that fell