Staking is the process of actively participating in transaction validation (similar to mining) on a proof-of-stake (PoS) blockchain.

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Oxford Business English Dictionary

stake
stake

stake noun, verb

■ noun

BLOCKING STAKE

1 (Finance ) [C, usually sing.]
money that sb invests in a company:
□ The group has a 40% stake in the airline.
□ He paid £140 million for a 51% controlling stake in the brewery.
a controlling/majority/minority stake (in sth) ◆ to acquire/buy/sell/take a stake (in sth) ◆ to cut/increase/raise/reduce your stake (in sth) ◆ to have/hold/own a stake (in sth)

2 [C]
something that you risk losing, especially money, when you try to predict the result of a race, etc. or when you are involved in an activity that can succeed or fail:
□ How much was the stake
(= how much did you bet)?
□ When you start a new business, the stakes are high, but the rewards can be great.

3 [sing.]
an important part or share in a business, plan, etc. that is important to you and that you want to be successful:
□ The workers all have a personal stake in the wage negotiations.

IDIOMS

at stake
that can be won or lost, depending on the success of a particular action:
□ Hundreds of jobs are at stake if the firm doesn't win this contract.

PLAY verb

■ verb [+ obj]
to risk money or sth important on the result of sth:
□ The company is staking its future on the success of this product.

IDIOMS

stake (out) a/your claim (to/for/on sth)
to say or show publicly that you think sth should be yours:
□ By taking over its main competitor, the group has staked its claim to be the biggest high-street retailer.

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