boring

[1]	drilling
[2]	drilling , oil production

adj.

[1]	dull , monotonous , tedious , humdrum , tiresome , dreary , flat , dead , uninteresting , unexciting , ennuyant , stale , tired , dry , dry-as-dust , arid , tiring , wearying , wearisome , exhausting , soporific , repetitious , wordy , prolix , unending , long-drawn-out
[2]	deadening , dull , ho-hum , irksome , slow , tedious , tiresome , wearisome