Unvarying

verb (used with object), varied, varying.
1.
to change or alter, as in form, appearance, character, or substance:
to vary one’s methods.
2.
to cause to be different from something else:
The orchestra varied last night’s program with one new selection.
3.
to avoid or relieve from uniformity or monotony; diversify:
to vary one’s diet.
4.
Music. to alter (a melody or theme) by modification or embellishments without changing its identity.
verb (used without object), varied, varying.
5.
to show diversity; be different:
The age at which children are ready to read varies.
6.
to undergo change in appearance, form, substance, character, etc.:
The landscape begins to vary as one drives south.
7.
to change periodically or in succession; differ or alternate:
Demand for certain products varies with the season.
8.
to diverge; depart; deviate (usually followed by from):
to vary from the norm.
9.
Mathematics. to be subject to change.
10.
Biology. to exhibit variation.
verb varies, varying, varied
1.
to undergo or cause to undergo change, alteration, or modification in appearance, character, form, attribute, etc
2.
to be different or cause to be different; be subject to change
3.
(transitive) to give variety to
4.
(intransitive) foll by from. to differ, as from a convention, standard, etc
5.
(intransitive) to change in accordance with another variable: her mood varies with the weather, pressure varies directly with temperature and inversely with volume
6.
(transitive) (music) to modify (a theme) by the use of variation

vary var·y (vâr’ē, vār’ē)
v. var·ied, var·y·ing, var·ies

To make or cause changes in the characteristics or attributes of; modify or alter.

To undergo or show change.

To be different; deviate.