Hanta — a warm, affectionate word. It means something like: alright then, very well. The way a grandparent might respond to a child's eager request — with a smile and a soft yes. Arjuna asked three times. Krishna responds with hanta — accepted.
But Krishna sets expectations honestly. My expanse has no end. What I am about to tell you are the principal examples, not the complete list. This honesty is itself remarkable. The divine acknowledges that a full description of its own manifestations is beyond words. The same point will return in 10.42, the chapter's final shloka.