expression / adjective:

• easy; trifling; harmless; of no concern; nothing
• nothing of the sort; not at all - in the form of ~でもなんでもない ➜ ではない

expression / noun:

• formidable person; shrewd person; someone not to be taken lightly; person of no common order
• certain person (e.g. whose name cannot be disclosed); someone
• that sort of person; that kind of person - archaism