People describe certain terms as a portmanteau of two other words, e.g. "fediverse is a portmanteau of federation and universe".
This of course assumes that everyone knows what "portmanteau" means.
Portmanteau is actually a combination of "portman" and "tow", from the Norman "teau".
In olden times, the portman would stand on an oared tugboat and tow boats into harbour two at a time, with a rope over each shoulder.
