monotonic

/ˌmɑnəˈtɑnɪk/

IPA: /M AA1 N AH0 T AA1 N IH0 K/

adjective
  1. 1

    Of or using the Greek system of diacritics which discards the breathings and employs a single accent to indicate stress. It replaced polytonic system in 1982.

  2. 2

    Said of a function that either never decreases or never increases as its independent variable increases.

  3. 3

    Uttered in a monotone; monotonous.

Antonyms

Source: https://en.wiktionary.org/wiki/monotonic