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