speculate

verb

1. to believe especially on uncertain or tentative grounds

   verb.cognition

   Synonyms conjecture hypothecate hypothesise hypothesize suppose theorise theorize

   Source: WordNet 3.0

2. talk over conjecturally, or review in an idle or casual way and with an element of doubt or without sufficient reason to reach a conclusion

   verb.communication

   Source: WordNet 3.0

3. reflect deeply on a subject

   verb.cognition

   Examples

   Philosophers have speculated on the question of God for thousands of years.

   Synonyms chew over contemplate excogitate meditate mull mull over muse ponder reflect ruminate think over

   Source: WordNet 3.0

4. invest at a risk

   verb.possession

   Synonyms job

   Source: WordNet 3.0

5. To consider by turning a subject in the mind, and viewing it in its different aspects and relations; to meditate; to contemplate; to theorize; as, to <i>speculate</i> on questions in religion; to <i>speculate</i> on political events.

   verb

   Source: webster1913

6. To consider attentively; as, to <i>speculate</i> the nature of a thing.

   verb

   Source: webster1913