উদাহরণ : A bad investment.
High risk investments.
Anything that promises to pay too much can't help being risky.
Speculative business enterprises.

সমার্থক : bad, high-risk, risky

উদাহরণ : A notional figure of cost helps in determining production costs.
Speculative knowledge.

সমার্থক : notional

উদাহরণ : If someone saw a man climbing a light post they might get inquisitive.
Raised a speculative eyebrow.

সমার্থক : inquisitive, questioning, wondering