This is the 14942nd most frequent Russian word.
подкрепить
"Подкрепить" means "to reinforce, support, or strengthen."
The word 'подкрепить' is used here to mean 'to support' or 'to strengthen' in the sense of reinforcing arguments with evidence or facts.
Я хочу подкрепить свои доводы фактами.
I want to support my arguments with facts.
Here, 'подкрепите' is a polite request implying 'to refill,' often used in relation to food or drink to signify replenishing.
Подкрепите, пожалуйста, чашку кофе.
Please refill the cup with coffee.
In this context, 'подкрепить' is used idiomatically meaning 'to restore or regain strength,' often referring to eating or resting.