suppose

suppose /səˈpoʊz/ verb
supposes; supposed; supposing
suppose
/səˈpoʊz/
verb
supposes; supposed; supposing
Britannica Dictionary definition of SUPPOSE
[+ object]
1 
: to think of (something) as happening or being true in order to imagine what might happen
2 
a  : to believe (something) to be true
b  : to believe (something) to be possible — usually used following the pronoun I
◊ In responding to a question, the phrase I suppose (so) is used as a way of agreeing or saying “yes” when you are not certain or not very excited or interested.
◊ The phrase I suppose not is used as an informal way of agreeing with a negative statement or of saying “no.”
3 
— used to ask a question in a polite way

be supposed

1 
a  : to be expected to do something
b  : to be intended or expected to be (something)
c  — used to show that you are angry or offended by something — followed by to + verb
2 
a  — used to say what someone should do — followed by to + verb
b  — used to say what someone is allowed to do — followed by to + verb
3 
— used to indicate what people say about someone or something — followed by to + verb