The term 'insomuch as' is a conjunction meaning 'inasmuch as' or 'to the extent that'. It is used to introduce a statement that explains or supports a preceding statement. It is often used to express a cause-and-effect relationship between two statements. For example, one might say 'Insomuch as I have been working hard, I deserve a raise.' This sentence implies that because the speaker has been working hard, they should be rewarded with a raise.