KanjiJLPT N2
Vice-

vice-, assistant, aide, duplicate, copy

Mnemonic

The Vice- president carries a bottle and a knife to every meeting — the bottle to pour his boss's water, the knife to slice his steak. Always second, always serving. That's the Vice- life: you hold the bottle, you wield the knife, but the glory goes to number one.
Additional thoughts
Picture a dutiful deputy with a bottle in one hand and a knife in the other, always one step behind the president. These tools of service define the subordinate role — important, but never first.
Quick recall
The Vice- president serves the boss with bottle and knife, forever second in command.

Details

The keyword for 副 is vice-. This kanji conveys the idea of being secondary, supplementary, or subordinate to a primary counterpart. It is used to denote a deputy or assistant role, as in someone who serves alongside or in place of a principal figure. The character carries the sense of something that accompanies or supports the main element, indicating a secondary but still important position.
On'yomi
ふく