How do you spell Speculative

Available Definitions:
1)  a. - Given to speculation; contemplative.
2)  a. - Involving, or formed by, speculation; ideal; theoretical; not established by demonstration.
3)  a. - Of or pertaining to vision; also, prying; inquisitive; curious.
4)  a. - Of or pertaining to speculation in land, goods, shares, etc.; as, a speculative dealer or enterprise.