4
votes
3answers
616 views

Change of form of some (Latin) prefixes like ex-, ad- into ef-, a-: are there rules or conditions?

There are many cases of prefixes changing their forms. For example ex- can change to ef- in front of f, e.g. effusion. ad- becomes a- in front of b, e.g. abate. Are there some more general rules ...
5
votes
3answers
304 views

What is the correct Latinate prefix for honey-eaters?

In English, a vegetarian who eats eggs and dairy products can be referred to as an ovo-lacto vegetarian. By the same token, could a person who eats honey but is otherwise vegan be meaningfully called ...
5
votes
3answers
6k views

What is the difference between “Hept-” and “Sept-” prefixes?

As I understand it, both the prefixes "Hept-" and "Sept-" are used to indicate seven of something. We have examples of English words that use both: e.g. Heptathalon, Heptagon, Heptane vs ...
5
votes
1answer
324 views

Why isn’t “disharmony” spelled “*dysharmony”?

Disharmony is a Greek word with a Latin prefix meaning “absence of harmony” or “bad harmony”. So why not spell it dysharmony, as one spells dysfunction or dyspepsia?