The vital aim of the proposed node taxonomy method in Mobile Ad-hoc NETwork (MANET) is to prevent the normal or good nodes present in the network from some infected nodes. The tainted individual nodes present in the network may affect the normal unaffected nodes in the network. To overcome that, this paper proposes a novel node taxonomy method which uses the adjacency matrix. The entries in the adjacency matrix are the link strength between the nodes. The concept behind the proposed method, the node which is connected with super threshold number of known adversaries is classified as adversary.