denigrate
['dɛnə`gret]
vt. 使黑, 玷污, 诋

1. However, some of the machines' traditional tasks have been shifted to lower-cost computers in many corporate networks, leading rivals to denigrate the mainframe as a dinosaur.
   而许集网络，些应型任已改低算完。使竞者将型看已灭绝恐。
2. Our business is highly competitive, and we aggressively seek to expand our client relationships. However, we must always be fair competitors and must never denigrate other firms.
   竞激烈，故积求展户系。但坚秉竞，绝诋竞。

denigrate
[ verb ]

1. cause to seem less serious; play down

<verb.communication> belittle derogate minimize
Don't belittle his influence

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

<verb.communication> asperse besmirch calumniate defame slander smear smirch sully
The journalists have defamed me!
The article in the paper sullied my reputation

Denigrate \Den"i*grate\, v. t. [L. denigrare; de- + nigrare to
blacken, niger black.]
1. To blacken thoroughly; to make very black. --Boyle.

2. Fig.: To blacken or sully; to defame. [R.]

To denigrate the memory of Voltaire. --Morley.