A doubtful thing or situation is uncertain and not easily trusted.
When we talk about something being doubtful, it means that there's some uncertainty or doubt in our minds. We might say "I'm doubtful about what to do next" when we're unsure of what to choose. Or, "The weather forecast seems doubtful today" if the predictions don't seem very clear-cut. The word can also describe someone who is uncertain or lacking confidence - for example, a person might be described as doubtful after giving a speech that didn't go well.
A doubtful person or thing.
Subject to, or causing doubt.
