This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A worst or lowest point.

adj. of an organism's environment; least favorable for survival

"This states that it is the CDF (the Vatican department that enforces orthodoxy) which must deal with the use of the confessional for sexual exploitation and with the abuse of pre-adolescent children, which is described in the document as crimen pessimum, the worst of all crimes."

worst   

zenith    optimum    apex   

pessimism   

nadir