time-consuming
Time-consuming (adjective) means taking a great deal of time to do, especially more than seems warranted. Example: “Checking every invoice by hand is accurate but painfully time-consuming.”
How to use time-consuming
Learner’s notesIn plain EnglishSomething that eats up a lot of your time.
Neutral, common in business and academic writing. It carries a faint note of complaint — writers rarely call something time-consuming as a compliment.
It describes the activity, not the person: say "the report was time-consuming", not "I was time-consuming".
Fill the gap
Can you complete this real example?
Checking every invoice by hand is accurate but painfully _____.