I've recently been looking at what makes chords what, and hence my first target for this was looking at major, minor, sus2, and sus4 chords. I know major chords are made up of the first, the third, and the fifth of the scale, and from memory I think that minor chords are the same as major chords, apart from the interval to the third is a minor third (hence the resultant chord has its third of the scale one semitone flattened).
Suspended chords (sus2 and sus4) however are arousing a bit of confusion from my end. I can see that in sus2 chords the third is brought down to the second, and in sus4 chords that the third is brought up to the fourth. Presumably this would explain the '2' and '4' in the name - but that leaves me questioning the 'sus' portion of their name.
What's up with the 'sus' in the name of sus2 and sus4 chords?
EDIT: Removed some text about a possible link to "suspended" intervals (which as far as I'm aware don't actually exist - I was thinking about diminished intervals).