Ignore the scare tactics! If you've decided to learn Czech, the first thing that other learners or (especially) natives may do is tell you how hard it is. It's got 7 cases, unpronounceable consonant clusters, irregular plurals, unrecognisable vocabulary, the hard-to-pronounce letter Å, lions and tigers and bears, oh my!!!
Definition of villainous. 1a : befitting a villain (as in evil or depraved character) a villainous attackb : being or having the character of a villain : depraved the villainous foe.
A character who functions as a resisting force to the goals of the protagonist. The antagonist is often a villain, but in a case where the protagonist is evil (for example, in Macbeth), the antagonist may be virtuous (i.e., Macduff).