detriment

Short definition from Wiktionary

Noun

1. 1
   Harm, hurt, damage.
2. 2
   A charge made to students and barristers for incidental repairs of the rooms they occupy.
3. 3
   The position or state of a planet when it is in the sign opposite its house, considered to weaken it.
4. 4
   The position or state of being eclipsed, entirely dark (sable).

Verb

1. 1
   To be detrimental to; to harm or mar.