Stability

STABILITY, noun [Latin See [[Stab]].]

1. Steadiness; stableness; firmness; strength to stand without being moved or overthrown; as the stability of a throne; the stability of a constitution of government.

2. Steadiness or firmness of character; firmness of resolution or purpose; the qualities opposite to fickleness, irresolution or inconstancy. We say, a man of little stability or of unusual stability

3. Fixedness; as opposed to fluidity. [I believe not now used.]

Since fluidness and stability are contrary qualities--