tedious
adj.boring and lasting for a long time. You use this to describe tasks or situations that feel slow and tiring because they are repetitive.
adj.tiresome by reason of length, slowness, or dullness. Often describes repetitive manual or administrative tasks that lack variety.
“Checking every line of the report was a tedious job.”
“The commute became tedious after the third week of train delays and heavy traffic.”
“While the initial research was exciting, the subsequent data entry proved so tedious that the team struggled to maintain their focus over the long winter months.”
Often used predicatively after linking verbs like 'become', 'find', or 'seem'.
“There were some lovely efforts at the World Cup (not least by the co-hosts the USA ), and others more tedious than a 0-0 draw.”
English tedi(um) + -ous, from Old French tedieus, from Late Latin taediōsus, from Latin taedium (“weariness, tedium”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.