vague

not clearly understood or expressed; "an obscure turn of phrase"; "an impulse to go off and fight certain obscure battles of his own spirit"-Anatole Broyard; "their descriptions of human behavior become vague, dull, and unclear"- P.A.Sorokin; "vague.

अस्पष्ट "% 1. *" एक्सप्रेशन

The speaker was vague on the subject