Underminatory

Underminatory: adjective. Something or someone capable of undermining the position of another thing or person. The word can be used both in the literal and metaphorical sense, which is well contrasted in the following sentence: "The mine was underminatory to the position of the count's new castle; a fortress that was underminatory to the king." Something underminatory must not always be used to truly undermine one's position; the word denotes the status itself of having the ability to undermine. The word originates from a translation of Greek legends by a famous English author (whose name is unknown), its first appearance being used in reference to a minotaur in the underground tunnels of a certain island fortress.