This is the 402nd most frequent Chinese word.
按
"Press," "push," or "according to."
'按' here means 'press', used to indicate applying pressure with a finger or palm to a button or surface.
请按这个按钮开门。
Please press this button to open the door.
'按' in '按照' means 'according to' or 'following', used to indicate compliance or adherence to rules or standards.
按照规定，我们需要佩戴头盔。
According to the regulations, we must wear helmets.
'按' in '按时' means 'on' or 'as per', used to denote doing something punctually or within a specific timeframe.