The term 'defiantly aggressive' can be broken down into four crossword solutions: TRUCULENT (9 letters), SASS (4 letters), dares (5 letters), and DARE (4 letters). TRUCULENT is an adjective meaning 'fiercely aggressive or defiant'. SASS is a noun meaning 'impudent or cheeky behavior'. Dares is a verb meaning 'to challenge someone to do something'. DARE is a verb meaning 'to challenge someone to do something'. All of these words describe someone who is defiantly aggressive, challenging others to do something and exhibiting fierce and impudent behavior.