What I looked at so far was:
The word Sukhmani literally means Peace
in your mind. [last four words in italics]
(1) http://en.wikipedia.org/wiki/Sukhmani
(2) 1 (mwd) sukhamAnin mfn. thinking
(anything) to be joy, seeing joy in (loc.)
BhP.
(mwd) = Cologne Digital Sanskrit Lexicon
http://webapps.uni-koeln.de/tamil/
(3) 1 (mwd) sukhamada mfn. pleasantly
intoxicating Car.
http://webapps.uni-koeln.de/tamil/
*********************************************
I wonder if Paul Twitchell "coined" the word
Sugmad.
This is what I found for "sukha":
3 (mwd) sukha mfn. (said to be fr. 5. %{su}
+ 3. %{kha} , and to mean originally `" having
a good axle-hole ; possibly a Pra1kr2it form
of %{su-stha} q.v. ; cf. %{duHkha}) running
swiftly or easily (only applied to cars or char-
iots , superl. %{sukha4-tama}) , easy RV. ;
pleasant (rarely with this meaning in Veda) ,
agreeable , gentle , mild (comp. %{-tara4})
VS. &c. &c. ; comfortable , happy , prosp-
erous (= %{sukhin}) R. ;
4 (cap) sukha a. easy, pleasant, comfortable,
happy; n. ease, comfort, pleasure, joy, bliss,
as adv. = instr. (abl.), & --- easily, with
pleasure, willingly, happily.
http://webapps.uni-koeln.de/tamil/
The idea of having a good axle hole appears
significant. (Sanskrit words with root "suga-"
suggest the idea of "easy", etc., too.)
Look at this etymology.
"It is perhaps amusing to note the etymology
of the words sukha (pleasure, comfort, bliss)
and duḥkha (misery, unhappiness, pain). The
ancient Aryans who brought the Sanskrit lan-
guage to India were a nomadic, horse- and
cattle-breeding people who travelled in horse-
or ox-drawn vehicles. Su and dus are prefixes
indicating good or bad. The word kha, in later
Sanskrit meaning "sky," "ether," or "space,"
was originally the word for "hole," particularly
an axle hole of one of the Aryan's vehicles.
Thus sukha … meant, originally, "having a
good axle hole," while duhkha meant "having
a poor axle hole," leading to discomfort." [2]
http://en.wikipedia.org/wiki/Dukkha
This Sanskrit Dictionary gives another refer-
ence for "dukkha":
1 (mwd) duHkha 1 mfn. (according to gramm
arians properly written %{duS-kha} and said
to be from %{dus} and %{kha} [cf. %{su-kha4}] ;
but more probably a Pra1kritized form for %
{duH-stha} q.v.) uneasy, uncomfortable, un-
pleasant , difficult R. Hariv. (compar. %{-tara}
MBh. R.) ; n. (ifc. f. %{A}) uneasiness, pain,
sorrow, trouble, difficulty S3Br. xiv , 7 , 2 ,
15 Mn. MBh. [....]
http://webapps.uni-koeln.de/tamil/
In this case, with the axle hole, the prefixes
su- and dus- appear to have opposite mean-
ings. However, the above definitions have an
illustration including (duH-stha), and so the
spelling "dus-" could be a shortened form of
a longer word (perhaps).
http://en.wikipedia.org/wiki/Clipping_%28morphology%29
Going back to the Sanskrit dictionary and
searching for a word spelled, "su-stha" in-
stead of "du-stha" I found.
1 (mwd) sustha mf(%{A})n. well situated ,
faring well , healthy , comfortable , prosperous ,
happy (compar. %{-tara}) Mn. MBh. &c. ; %
{-kalpa} mfn. almost well or at ease S3ak. ;
%{-citta} mfn. easy at heart , feeling happy
or comfortable MBh. ; %{-tA} f. health , welfare ,
happiness R. ; %{-tva} n. id. MW. ; %{-mAnasa}
mfn. (= %{-citta}) R.
2 (cap) sustha a. being well or comfortable
http://webapps.uni-koeln.de/tamil/
From all of this I learned that the Sanskrit
prefixes sus- and dus- appear to have the
general meanings of "good" and "bad".
In order to learn more about the "Eckankar"
word Sugmad, the history of that word, it
seems one could have to find more clues
from the person who initially coined it. The
one who introduced it.
Does anybody recall Paul Twitchell elab-
orating about where he first heard about
the word Sugmad?
I think Paul Twitchell would have been
familiar with the word Sukhmani - name
given to the set of hymns ... which appear
in the Sri Guru Granth Sahib, the Sikh
Holy Scriptures. I can't absolutely say it
inspired the word Sugmad (God forbid it
should have anything to do with mind.)
The Sanskrit word "mad" appears it could
be a "clipping" of several different words.
Including "mand".
"Mad" and "Mada" can be found after
searching all the dictionaries here.
http://webapps.uni-koeln.de/tamil/
OK. That's all the time I have for research
on the word Sugmad right now. It's a start,
perhaps.
Etznab