Latin, meaning: personal enemy, foe, opponent. 
Inimicus is a genus of venomous fishes, closely related to the true stonefishes. This genus is a member of the Synanceiidae (devilfishes, goblinfishes, and stonefishes) family of the Scorpaeniformes order of ray-finned fishes. These benthic fishes are found on sandy or silty substrates of lagoon and seaward reefs, in coastal regions of tropical oc...
A hostile or enemy. 
personal enemy, foe, opponent.