Alter - (Webster's 1828 Dictionary)
AL'TER, v.t. [L. alter, another. See Alien.]
1. To make some change in; to make different in some particular; to vary in some degree, without an entire change.
My covenant will I not break, nor alter the thing that has gone out of my lips. Psa 89.
2. To change entirely or materially; as, to alter an opinion. In general, to alter is to change partially; to change is more generally to substitute one thing for another, or to make a material difference in a thing.
AL'TER, v.i. To become, in some respects, different; to vary; as, the weather alters almost daily.
The law which altereth not. Dan 4.