to have an idea of what something is like or what it might be likeIt’s hard to imagine a more unpleasant job.
imagine/you can imagine/just imagine something: Imagine my surprise when they announced I had won!
imagine (that): He had never imagined that digging was such hard work.
imagine what/why/how etc: You can imagine what the newspapers would do if they ever found out about this.
fondly imagine (=have a mistaken idea about something): I had fondly imagined that riding a camel would be easy.