monotonously

English

From monotonous +‎ -ly.

monotonously (comparative more monotonously, superlative most monotonously)

In a manner that is tedious, repetitious or lacking in variety.
She worked monotonously at the assembly line.
- 1834, L[etitia] E[lizabeth] L[andon], chapter XIII, in Francesca Carrara. […], volume III, London: Richard Bentley, […], (successor to Henry Colburn), →OCLC, page 97:
  Time passed as time ever does when passed monotonously, that is, with a degree of rapidity which only astonishes us when it is recalled to mind by some chance circumstance.
In a droning manner, that does not change pitch.
The minister spoke monotonously and his congregation began to doze.

in a manner that is tedious

in a droning manner