interminable \in-TUR-muh-nuh-buhl\, adjective:

so long as to seem endless; never stopping

I’m starting to realize that my vocabulary is lacking. I understand words when I read them b/c I understand the sentences as a whole but there are a lot of words I know just by what the sentence infers. This is one of them. I’ve seen it plenty of times, and know the general meaning but never knew the exact definitely and therefore don’t use it.