tedious

Where it comes from

Tedious came through Middle English from Late Latin taediosus, based on Latin taedium, disgust, irksomeness, or weariness. Taedium in turn comes from taedere, to weary or disgust.

How the meaning developed

Unlike dramatic reversals in meaning, tedious stayed within one emotional field. What we now call boring was first framed as something that produces weariness or aversion, especially through length, slowness, or dull repetition.

In use

Instead of “I’m so bored.”
Try “This has become unbearably tedious.”

“Tedious” describes something so uninteresting, slow or repetitive that it causes mental weariness.
It complains about the experience, not necessarily the person who made it.