despite a considerable knowledge

despite Preposition

— If mathx/math happens despite mathy/math, it is surprising that mathx/math happens because mathy/math usually stops it. Despite their best efforts, the ministers have not been able to come to an agreement. Despite all the problems, I think this project is a success. We hope that there will soon be changes despite the fact that the leaders are still the same old people. — If you do something despite yourself, you didn't plan or want to do it. She hated him, but when he spoke she laughed despite herself.

a Determinative

— A is used when the following word could be any of a certain type. Compare "A book I saw on the shelf" and "The book I gave you yesterday".

a Noun

— A is the first letter of the alphabet. The letter "a" comes before "b". — In some schools, an A is a very high grade. Ron got an A on his earth science test.

considerable Adjective

— A considerable amount, time, degree, etc. is a fairly large or important one. He had given it a considerable amount of thought before deciding. Many part-time farmers traveled considerable distances each day to their work. The time needed to do it properly is considerable.

knowledge Noun

— Knowledge is information that you know. He shared his knowledge with you.