Phrase
familiar with something so that it seems normal or usual
used to
You may be used to a much warmer climate, or you may just find the grayness and dampness, especially during the winter months, difficult to get used to.
heavy
You may find British food strange. It may taste different, or be cooked differently, or it may seem tasteless or heavy compared with what you are used to.
thoroughly
Although you may have learned English very thoroughly, it is possible that the regional accents you discover when you arrive in the UK make the language harder to understand than you thought.