Про старый ~ антиюный не соглашусь. Первое действительно есть второе, а если их первичные значения обрастают вторичными в культурах — притом сходными в разных, — то это точно не проблема словообразования. Кроме этого, понятие «старый» можно выразить огромной кучей способов.
Выразить-то можно, конечно, как угодно, но не лучше ли просто взять особый корень для понятия "старый", или скажем, "маленький" (а не "антибольшой")? Не зря же для них во всех (по-видимому) языках есть особые корни. Это самостоятельные, особые понятия, как бы особые миры, со своими ассоциациями, коннотациями и т.п. Юнг бы написал, что это разные архетипы. Когда произносишь "антиюный", звучит "юный", просто с приставкой, а он не должен звучать, звучать должен именно "старый". Во всяком случае, на мой вкус и цвет.
Насчёт компутила - пардону, я похоже перепутал с Идо, там та же проблема. Вот недавнее сообщение с auxlang'a:
The biggest problem with Ido is not a lack of technical terms. The big
dictionaries as well as the two Lexiki (especially the second one, published in
2001) are full of obscure technical words. But then Ido still lacks a word for
"computer", that thing I've been using every day since 1996/7 to research and
use auxlangs. This leads to a situation where two different words have been
coined, komputoro* and komputilo*, which both have to carry an asterisk. What
it needs is for someone to get hold of the problem and arrive at a choice of one
or the other, and then officialize it.
What Ido lacks is words for new everyday things. I'm hoping of course that the
change of Linguala Sekretario will finally unblock the tubes, but that will take
time and so far I haven't seen any uptick in interest in new words, eg. on
Linguolisto.
И ответ от эсперантиста:
The same debate (about a word for "computer") happened in Esperanto
about 20 years ago, maybe less. The problem was (and it's probably the
same in Ido) that the root "komput-" already existed meaning "compute"
in the mathematical sense, and,. of course, a present-day computer does
a whole lot more than that; so, in principle "komputilo" wouldn't do.
Some people maintained that "komputilo" ought to mean, or actually did
mean, "adding machine". Likewise taking "komputero" from English
wouldn't do, as "-ero" is a suffix meaning "item, component" so a
"komputero" would be an item, or instance, of computation, whatever that
would be. So others proposed "komputoro", but it didn't catch on.
Eventually people accepted "komputilo", so the root "komput-" has
tacitly been revised to mean "to do things using a computer".
Derivatives such as "komputado", "komputisto" etc. have arisen accordingly.
As far as I know none of this has been officialised, or perhaps only
recently.