To disparage.
to reduce the official estimate of a storm's intensity.
To reduce in complexity, or remove unnecessary parts; to dumb down.
To place lower in position.
To revert software back to an older version.
A reduction of a rating, as a financial or credit rating.
A downhill gradient on a road or railway.
To elevate to a higher league.
To increase the activity of (a catalyst) by changing its surface structure.
To raise (someone) to a more important, responsible, or remunerative job or rank.
To move on to a subsequent stage of education.
To encourage, urge or incite.
To advocate or urge on behalf of (something or someone); to attempt to popularize or sell by means of advertising or publicity.
To exchange (a pawn) for a queen or other piece when it reaches the eighth rank.