For example, if you tune 2 strings on a guitar to the same note (same frequency), if you pluck one of these strings, the other string will also start vibrating.
(you; tune; 2 strings on a guitar to the same note) (you; pluck; one of these strings) (the other string; will also start; ) (the other string; vibrating; )
you you the other string the other string
tune pluck will also start vibrating
2 strings on a guitar to the same note
one of these strings