Invidious
(As opposed to insidious, though insidious is kinda cool too.)
And here's a word which I've always been fond of, yet never actually
managed to use... "obverse". I.e. the opposite of reverse *hehe*.

I might also be said, that anyone who tells Shusen to "grow up", when
what he is doing is advancing his own (and lots of other people's)
vocab... is pretty thick and oughta grow up themselves. After all...
Cove's favourite word is "grow" - which is cool in meaning as that is
what this whole thing is about - those of us taking an interest in it,
are.... growing. A certain other person seems to think thats a thing to
scoff at *shakes his head in sadness*

Penned by my hand on the 5th of Lupar, in the year 329 AF.