The definition of monotonous is having little or no variety.
Remaining the same; showing or undergoing no change:
Not changing or subject to change; constant.
Continually occurring; persistent:
Having an even number in a sequence.
Persistently occurring in the mind; obsessive:
The definition of plain is clearly understood, obvious, simple or not complicated.
Not easily excited or upset:
Having all sides or faces equal. For example, a square is a regular polygon, and a cube is a regular polyhedron.
Unchanged; not different
Having or consisting of various kinds or forms; diverse:
Find another word for unvarying. In this page you can discover 21 synonyms, antonyms, idiomatic expressions, and related words for unvarying, like: monotonous, unchanging, invariable, continuing, constant, even, fixed, plain, steady, unfluctuating and uniform.