v.
1.to believe especially on uncertain or tentative grounds
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
3.reflect deeply on a subject
4.invest at a risk
Idiom of the Day
incumbent upon (someone) to (do something)
necessary for someone to do something
It is incumbent upon the next mayor to try and do something about crime in the city.