invidious

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

• adjective Tending to rouse ill will, animosity, or resentment.
• adjective Offensive and unfair.
• adjective Archaic Envious.

from The Century Dictionary.

• Envious; causing or arising from envy.
• Enviable; desirable.
• Prompted by or expressing or adapted to excite envious dislike or ill will; offensively or unfairly discriminating: as, invidious distinctions or comparisons.
• Hence Hateful; odious; detestable.
• Synonyms Invidious, Offensive. Invidious, having lost its subjective sense of envious, now means producing or likely to produce ill feeling because bringing persons or their belongings into contrast with others in an unjust or mortifying way: as, an invidious comparison or distinction. The ill feeling thus produced would be not envy, but resentment, on account of wounded pride. Offensive is a general word, covering invidious and all other words characterizing that which gives offense.

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

• adjective obsolete Envious; malignant.
• adjective obsolete Worthy of envy; desirable; enviable.
• adjective Likely to or intended to incur or produce ill will, or to provoke envy or resentment; hateful; offensive.

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

• adjective offensively or unfairly discriminating
• adjective causing ill will towards the actor; causing offense.
• adjective of a thing causing envy or ill will towards the possessor
• adjective envious, jealous
• adjective obsolete Hateful; odious; detestable

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

• adjective containing or implying a slight or showing prejudice