bungle (n.) Look up bungle at Dictionary.com
"a clumsy piece of work," 1650s, from bungle (v.).
bungle (v.) Look up bungle at Dictionary.com
"to work or act clumsily," 1520s, origin obscure. OED suggests imitative; perhaps a mix of boggle and bumble, or perhaps [Skeat] from a Scandinavian word akin to Swedish bangla "to work ineffectually," Old Swedish bunga "to strike" (related to German Bengel "cudgel," also "rude fellow"). Related: Bungled; bungling.