Which word corresponds to the meaning of absolute and certain?

The word that corresponds to the meaning of absolute and certain is "unequivocal." This term describes something that leaves no doubt; it is clear and unambiguous in meaning or intent. When something is unequivocal, it conveys confidence and certainty without any possibility of misunderstanding or misinterpretation. This is especially important in contexts where clarity and decisiveness are crucial.

For example, if a statement or response is unequivocal, it means that the speaker or writer is fully confident in what they are conveying, effectively removing any ambiguity. This contrasts with other words in the choices provided, which do not carry this same meaning of clarity and certainty. Scant refers to something that is insufficient or lacking, onerous implies something that is burdensome or heavy, and whet means to sharpen or stimulate, often in relation to appetite or interest. None of these terms reflect the quality of being absolute or certain like unequivocal does.