vital
visualise
adjustment
knock-on effect
familiar
tune in
it causes other events or situations, but not directly
necessary for the success or continued existence of something; extremely important
easy to recognize because of being seen, met, heard, etc. before
to watch or listen to a particular television or radio programme or station
to form a picture of someone or something in your mind, in order to imagine or remember him, her, or it
a small change
