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.
sinister. 1  Archaic on, to, or toward the left-hand side; left. 2  Heraldry on the left side of a shield (the right as seen by the viewer). 3  threatening harm, evil, or misfortune; ominous; portentous: sinister storm clouds. 4  wicked, evil, or dishonest, esp. in some dark, mysterious way: a sinister plot. Archaic on, to, or toward the left-hand side; left. 2  Heraldry on the left side of a shield (the right as seen by the viewer). 3  threatening harm, evil, or misfortune; ominous; portentous: sinister storm clouds. 4  wicked, evil, or dishonest, esp. in some dark, mysterious way: a sinister plot.