What is suspended chords in piano?
Suspended Chords (or Sus Chords) are chords where the 3rd has been replaced by a 2nd or (usually) 4th. These create a much more ambiguous and floating sound. The sus4 chord is much more common than the sus2 chord, so the '4' is often dropped.
What is a suspended 4th chord?
A suspended chord (or sus chord) is a musical chord in which the (major or minor) third is omitted and replaced with a perfect fourth or a major second. ... For example, the suspended fourth and second chords built on C (C–E–G), written as Csus4 and Csus2, have pitches C–F–G and C–D–G, respectively.