To guess; to venture an unproven idea.
To infer on slight evidence; to guess at.
A statement or an idea which is unproven, but is thought to be true; a guess.
A statement likely to be true based on available evidence, but which has not been formally proven.
A supposition based upon incomplete evidence; a hypothesis.
To take a customary action to ward off some misfortune that is believed to be attracted by a presumptuous statement.
Hopefully; a self-directive to undertake the customary action to ward off bad luck.