1. (

• bad ,
• risky ,
• high-risk ,
• speculative

) not financially safe or secure; "a bad investment"; "high risk investments"; "anything that promises to pay too much can't help being risky"; "speculative business enterprises" ;

2. (

• notional ,
• speculative

) not based on fact or investigation; "a notional figure of cost helps in determining production costs"; "speculative knowledge" ;

3. (

• inquisitive ,
• speculative ,
• questioning ,
• wondering

) showing curiosity; "if someone saw a man climbing a light post they might get inquisitive"; "raised a speculative eyebrow" ;