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

ସମକକ୍ଷ : bad, high-risk, risky

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

ସମକକ୍ଷ : notional

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

ସମକକ୍ଷ : inquisitive, questioning, wondering