Definition

Feeling uncertain or unsure about something; not confident in the truth or reliability of something.

Example

She was doubtful about the success of the project after hearing the feedback.

Conversation

Are you feeling doubtful about the exam tomorrow?

A little bit, actually. I haven't studied as much as I wanted to.

I understand; sometimes I feel doubtful too, especially with math.

Yeah, but I guess we'll just have to do our best!

Synonyms & Antonyms

Root Explanation

Doubtful → It is formed from "doubt" (from Old French *douter*, meaning to fear or be uncertain) and "-ful" (meaning full of). The word "doubtful" means full of doubt or uncertainty.

Memory Tip

Think of feeling 'full of uncertainty' — that's what 'doubtful' means.

Visually Confused Words