What is the meaning of speculation in tamil?

Meaning(s):

1. a message expressing an opinion based on incomplete evidence
2. a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence)
3. an investment that is very risky but could yield great profits
4. continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature
5. theory
6. guess
7. risk
8. gamble
9. सट्टेबाज़ी Speculation in oil
10. अटकलबाज़ी There was widespread speculation that she was going to resign.
11. चिंतन Deep speculation is basis for all real knowledge.
12. मनन Deep speculation is basis for all real knowledge.