cantankerous. Bad-tempered, argumentative and uncooperative.
avuncular. Kind and friendly towards a younger or less experienced person.
uncouth. (of a person or their appearence or their behaviour) lacking good manners, refinement or grace.
cad. A man who behaves dishonourably, esp. towards a woman.
egregious. Outstandingly bad, shocking. in the archaic sense: remarkably good.
hapax legomenon. A hapax legomenon (pl. hapax legomena, though sometimes called hapaxes for short) is a word which occurs only once in the written record of a language, in the works of an author, or in a single text. If a word is used twice it is a dis legomenon, thrice, a tris legomenon. Beyond tetrakis legomenon (four times), a word is not rare enough to note.