to suppose (introducing a proposition of uncertain plausibility).
To solve by a correct conjecture; to conjecture rightly.
To reach a partly (or totally) unqualified conclusion.
To think, conclude, or decide (without a connotation of uncertainty). Usually in first person: "I guess".
A prediction about the outcome of something, typically made without factual evidence or support.
to measure an amount or quantity or size that is needed or wanted, to mark the dimensions of something.