"para-" in words like "paraglider" and "parabrake"
As is well known, para-, in its meaning of "alongside or beyond", is derived from Greek loanwords such as paraphrase and parasite, while its meaning of "against" is derived from the Latin "be prepared" as in parachute and parasol.
My question is: From where is para- derived in words like, for example, parabrake and paraglider? Can parachute itself be the source of the prefix "para-" in these words?
The scope of the question is to investigate whether grammarians recognize only two roots for the para- words, or, instead, they recognize three roots, the last one having evolved independently in modern English.
Solution 1:
Merriam-Webster's Eleventh Collegiate Dictionary (2003) reports six distinct senses of the prefix para- (or par-):
1: beside: alongside of: beyond: aside from <parathyroid> 2a: closely related to <paraldehyde> b: involving substitution at or characterized by two opposite positions in the benzene ring that are separated by two carbon atoms <paradichlorobenzene> 3a: faulty: abnormal <paresthesia> b: associated in a subsidiary or accessory capacity <paramedical> c: closely resembling: almost <paratyphoid>.
In addition, the Eleventh Collegiate lists one combining form of para-:
para- comb form [parachute]: parachute
But it doesn't list another combining form that is evident from the opening portion of the dictionary's entry for Paralympics:
Paralympics n pl [paraplegic + Olympics]
Note: As Avon points out in a comment below, the International Paralympic Committee, which organizes the Paralympic Games, now presents the word paralympic as referring not to paraplegic but to parallel. The Wikipedia article on these games explains the change:
Although the name was originally coined as a portmanteau combining "paraplegic" (due to its origins as games for people with spinal injuries) and "Olympic," the inclusion of other disability groups meant that this was no longer considered very accurate. The present formal explanation for the name is that it derives from the Greek preposition παρά, pará ("beside" or "alongside") and thus refers to a competition held in parallel with the Olympic Games.
I couldn't find any non-proper nouns in the dictionary that use para- as a combining form with the meaning "paraplegic," but a Google search reveals that some parts of Alberta and Yukon Territory in Western Canada use the term pararamp to refer to wheelchair-friendly sidewalk-to-street ramps on city streets. Since these are not alternatives to some sort of normal ramp (normally, sidewalks end in curbs that drop off to the street several inches below), I don't think that any of the six senses of para- that the Eleventh Collegiate identifies apply here. If that's correct, then the para- in pararamp would seem to be short for paraplegic or paralytic.
The same cannot be said for paratransit and paratransport, which refer to services that are ancillary to the standard transit and transport options in the municipalities that offer them. Of course, many people who have difficulty with standard mass-transit options are neither paraplegic nor wheelchair-bound; but I suspect that the coiners of pararamp may have been influenced by their awareness that paratransit and paratransport do offer special services for people in wheelchairs.
In any event, as FumbleFingers says, parabrake and paraglider (like paratrooper) fall into the combining form of para- that signifies 'parachute." A final point: The words parasol, parachute, and paravane (referring to "a torpedo-shaped protective device with serrate teeth in its forward end used underwater by a ship in mined areas to sever the moorings of mines") use para- in the sense of "to ward off or to shield"; in the context of parachute, the Eleventh Collegiate says, chute means "fall."
Solution 2:
A very quick search would show that the roots of "paraglider" and "parabrake" are completely separate from the "para" (alongside) roots which you suspect.
The direct answer to your question is, yes, they derive from "parachute".
See https://en.wikipedia.org/wiki/Paragliding#History
Both words are portmanteau words, combining, for instance, parachute and glider.
The development of the parachute, especially after WWII, showed the possibility of parachutes with significant glide ratios, and by 1961 paragliding was established as a term. An early example of the modified parachute was the Para-Commander.