had been exhausting
Past perfect progressiveconjugation ofexhaust.There are other translations for this conjugation.

exhaust

Digging up the first few corpses had been exhausting, but when they obediently rose to aid their master things moved far more swiftly.
Desenterrar los primeros cadáveres había sido muy cansado, pero cuando estos obedientemente se levantaron para ayudar a su señor las cosas fueron mucho más deprisa.
Other Dictionaries
Explore the meaning of exhaust in our family of products.
Word of the Day
caveman