Open English Wordnet
Nouns
(n)sharkany of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales (n)sharka person who is ruthless and greedy and dishonest (n)sharka person who is unusually skilled in certain ways“a card shark” Verbs
(v)sharkplay the shark; act with trickery