–tacular suffix in the forming of nouns, ‘an exciting or extravagant event’ associated with the root; in the forming of adjectives, an intensifier of the root, ‘a lot, great, large, extravagant, excessive.’ Editorial Note: Terms created with –tacular tend to be jocular one-offs, though some, like spooktacular and craptacular, appear to have more endurance. Etymological Note: From a resegmenting of spectacular, in which the syllable tacular splinters off of spec and becomes a combining form. This true segmenting of the word would ordinarily be spectacul, from the Latin spectacul-um ‘a show, spectacle, something worth observing’ and the Latin suffix –ar ‘of a kind; belonging to.’ (source: Double-Tongued Dictionary)
Further reading
Mark in Bismarck, North Dakota, spent years as a sailor, and wonders about the term sea painter, meaning “a rope attached to a lifeboat.” Why painter? The word may derive from Middle French pendeur meaning “a kind of rope that...
Carrie Ann and her cousin Danielle from Minneapolis, Minnesota, wonder about the pronunciation of the word rhetoric. Is the stress on the first syllable or the second? This is part of a complete episode.
Related
Cf. the suffix <-tastic>, which often attaches to the same roots as <-tacular> for forming adjectives. (“Craptastic” and “craptacular” each return more than 50,000 Google-hits.)