Tmesis

In its strictest sense, tmesis (/ˈtmiːsɪs, təˈmiː-/; plural tmeses /ˈtmiːsiːs, təˈmiː-/; Ancient Greek: τμῆσις tmēsis – "a cutting" < τέμνω temnō, "I cut") is a word compound that is divided into two parts, with another word infixed between the parts, thus constituting a separate word compound. Example: "un-freaking-believable" (an emphatic way to say "unbelievable"). In a broader sense, tmesis is a recognizable phrase (such as a phrasal verb) or word that is divided into two parts, with one or more words interpolated between the parts, thus creating a separate phrase.