Well interestingly enough a "Pormanteau" literally means a large travelling bag, typically made of stiff leather and opening into two equal parts:
Based on the fact that it opens in TWO equal parts, a "Pormanteau" word is a blend of two different words. A shining example is the word "smog" (=νέφος) that derives from the words "smoke" and "fog". Several others:
moped = motor + pedal (=μοτοποδήλατο = μοτέρ + πεντάλ)
modem = modulator + demodulator
motel = motor + hotel (=modem = διαμορφωτής + αποδιαμορφωτής)
The video below offers a light-hearted look at how a few well-known portmanteaus have gotten their start.
Lastly, some MARKETING poRTMANTEAUS :
Listicle = is an informal term for an article made up of a series of facts, tips, quotations, or examples organized around a particular theme.
Webinar = an online seminar that turns a presentation into a real-time conversation from anywhere in the world.
Digerati = the elite of digitalization, social media, content marketing, computer industry and online communities.
Edutainment = A combination of entertainment with education: any type of entertainment aimed at entertaining and being educative
Subvertising = is the practice of making spoofs or parodies of corporate and politicaladvertisements.
Webcast = a media presentation distributed over the Internet using streaming media technology to distribute a single content source to many simultaneous listeners/viewers.
Netiquette = the rules of etiquette that apply when communicating over the Internet
Advertorial = An advertorial is an advertisement in the form of editorial content.