* Badsurat (बदसूरत): This is the most common direct opposite of "sundar" and means ugly.
* Kabih (कबीह): This word signifies something unattractive or lacking in appeal.
* Be-roopa (बे-रूपा): This literally translates to "formless" and implies a lack of beauty or distinct features.
* Khadoos (खडूस): This word is more metaphorical and means something that is harsh or unpleasant to look at.
* Ganda (गंदा): This means dirty or filthy and can be used to describe something visually unappealing.
The best opposite word for "sundar" will depend on the specific situation and what you want to emphasize.