Englishfor English speakers
sine
—
noun
ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle
qua
Preposition
—
as; in the role of...
A scientist may believe certain things qua practical man, but not qua scientist.
non
Prefix
—
non or non- means the same as not, but makes not part of the word it changes. When you add non- to a word it makes that word mean the opposite.
That drink is non-alcoholic, it has no alcohol in it.
He is a non-believer; he does not believe at all.