WHOLE CHARACTER
变
to change (变化, 改变); to become (变成); unexpected event (事变, 政变)
变 is to change — becoming something new, or suddenly not.
Limited whole-shape lesson: the reduced top (a shortened 亦-form from the traditional 變) and the hand piece 又 below are described rather than shown as a pretend split; the header says the formation was originally 形声, with the older sound piece reduced away.