Csus2 chord
C suspended second
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The Csus2 chord has the intervals I, II, V. Commonly used in pop, rock, and jazz, the suspended second chord usually has no third and therefore sounds open since it lacks a minor or major tonality. It can function as a preparatory chord before a resolution at the third.
Matching Scales: C Major C Minor C Major Pentatonic D Minor D Blues D Minor Pentatonic G Major G Minor G Blues