Imagine

Old French imaginer, from Latin imÄginor, from imÄginem, the accusative singular of imÄgÅ ("a copy, likeness, image").

Full definition of imagine

(transitive) To form a mental image of something; to envision or create something in one's mind.

ShakespeareIn the night, imagining some fear,
How easy is a bush supposed a bear!
2013-06-14, Jonathan Freedland, Obama's once hip brand is now tainted, Now we are liberal with our innermost secrets, spraying them into the public ether with a generosity our forebears could not have imagined. Where we once sent love letters in a sealed envelope, or stuck photographs of our children in a family album, now such private material is despatched to servers and clouds operated by people we don't know and will never meet.

Try to imagine a pink elephant.
(transitive) To believe in something created by one's own mind.
She imagined that the man wanted to kill her.
(transitive) To assume.
I imagine that he will need to rest after such a long flight.
(transitive) To conjecture or guess.
I cannot even imagine what you are up to!
The board imagines the merger will increase profits by 25%
(intransitive) To use one's imagination.
Imagine that we were siblings.
(transitive, obsolete) To contrive in purpose; to scheme; to devise.

This is a catenative verb that takes the gerund (-ing). See