derogatory

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Disparaging; belittling.
• adjective Tending to detract or diminish.

from The Century Dictionary.

• Detracting or tending to lessen by taking something away; that lessens extent, effect, estimation, etc.: with to, sometimes from.
• Synonyms Depreciative, discreditable, disgraceful.
• noun A derogatory act or statement; a disparagement.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Tending to derogate, or lessen in value; expressing a low opinion; expressing derogation; detracting; injurious; -- with from, to, or unto.
• adjective (Law) a sentence of secret character inserted by the testator alone, of which he reserves the knowledge to himself, with a condition that no will he may make thereafter shall be valid, unless this clause is inserted word for word; -- a precaution to guard against later wills extorted by violence, or obtained by suggestion.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Tending to derogate, or lessen in value of someone; expressing derogation; detracting; injurious.
• adjective law When referring to a clause in a testament: a sentence of secret character inserted by the testator alone, of which he reserves the knowledge to himself, with a condition that no will he may make thereafter shall be valid, unless this clause is inserted word for word; – a precaution to guard against later wills extorted by violence, or obtained by suggestion.
• noun A trade-line on a credit report that includes negative credit history.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective expressive of low opinion