Degrade (verb)

To lower in value or social position.

"Fred degrades himself by his behaviour."

Degrade (verb)

To reduce in quality or purity.

"The DNA sample has degraded."

Degrade (verb)

To reduce in altitude or magnitude, as hills and mountains; to wear down.

Denigrate (verb)

To criticise so as to besmirch; traduce, disparage or defame.

Denigrate (verb)

To treat as worthless; belittle, degrade or disparage.

"You have no right to denigrate people and things that you have no personal experience with."

Denigrate (verb)

To blacken.

Degrade

To reduce from a higher to a lower rank or degree; to lower in rank; to deprive of office or dignity; to strip of honors; as, to degrade a nobleman, or a general officer.

Degrade

To reduce in estimation, character, or reputation; to lessen the value of; to lower the physical, moral, or intellectual character of; to debase; to bring shame or contempt upon; to disgrace; as, vice degrades a man.

Degrade

To reduce in altitude or magnitude, as hills and mountains; to wear down.

Degrade (verb)

To degenerate; to pass from a higher to a lower type of structure; as, a family of plants or animals degrades through this or that genus or group of genera.

Denigrate

To blacken thoroughly; to make very black.

Denigrate

Fig.: To blacken or sully; to defame.

Degrade (verb)

reduce the level of land, as by erosion

Degrade (verb)

reduce in worth or character, usually verbally;

"She tends to put down younger women colleagues"

"His critics took him down after the lecture"

Degrade (verb)

lower the grade of something; reduce its worth

Denigrate (verb)

belittle;

"Don't belittle his influence"

Denigrate (verb)

charge falsely or with malicious intent; attack the good name and reputation of someone;

"The journalists have defamed me!"

"The article in the paper sullied my reputation"