'poder' means 'power' when it'a a noun.
'embargo' means 'seizure' or 'confiscation'
'secuestro' means 'abduction' or 'kidnapping'

To the asker's question, yes, you're right, it's not "suspension of the power to dispose of, seize and confiscate", it's (a) "suspension of the power to dispose of" (or more succinctly "freezing", referred to in the UK as "restraint"), plus (b) "seizure" and "sequestration". The term "confiscation" refers to a permanent measure, not a temporary one.

If this is from Colombia, then the phrase "embargo y secuestro" is covered by the term "seizure", as the definitions below show:
" ¿Qué es el embargo?
El embargo de bienes es la manera como el juez, por medio de una orden judicial, saca los bienes del demandado del comercio.
...
¿Qué es el secuestro?
De conformidad con el Art. No. 2273 del Código Civil, el secuestro de bienes es el depósito de una cosa que se disputan dos o más individuos, en manos de otro que debe restituir al que obtenga una decisión a su favor."

The term "sequestration" doesn't seem to be covered in the FATF recommendations, which talks about three main remedies, two provisional (freezing and seizure) and one permanent (confiscation):

"“Confiscation of assets or property”, also known in some jurisdictions as “forfeiture”, means the permanent deprivation of property by order of a court or other competent authority.
...
“Freezing” means temporarily prohibiting the transfer, conversion, disposition or movement of property, usually on the basis of an order issued by a court or a competent authority. The term is used interchangeably with “restraining”, “attachment”, “preservation” or “blocking”."
https://www.un.org/ruleoflaw/files/Confiscation_Manual_Ebook...

"Confiscation
The term confiscation, which includes forfeiture where applicable, means the permanent deprivation of funds or other assets by order of a competent authority or a court. Confiscation or forfeiture takes place through a judicial or administrative procedure that transfers the ownership of specified funds or other assets to be transferred to the State.
...
Freeze
In the context of confiscation and provisional measures (e.g., Recommendations 4, 32 and 38), the term freeze means to prohibit the transfer, conversion, disposition or movement of any property, equipment or other instrumentalities on the basis of, and for the duration of the validity of, an action initiated by a competent authority or a court under a freezing mechanism, or until a forfeiture or confiscation determination is made by a competent authority.

Seize
The term seize means to prohibit the transfer, conversion, disposition or movement of property on the basis of an action initiated by a competent authority or a court under a freezing mechanism. However, unlike a freezing action, a seizure is effected by a mechanism that allows the competent authority or court to take control of specified property."
FATF Recommendations - INTERNATIONAL STANDARDS ON COMBATING MONEY LAUNDERING AND THE FINANCING OF TERRORISM & PROLIFERATION
https://www.fatf-gafi.org/media/fatf/documents/recommendatio...

I think "sequestration" works well here for "secuestro" because it is a temporary measure in which assets are held in deposit until a decision is reached.

"In law, sequestration is the act of removing, separating, or seizing anything from the possession of its owner under process of law for the benefit of creditors or the state.
...
The Assets Recovery Agency (ARA) was established in the United Kingdom under the Proceeds of Crime Act 2002 to reduce crime by sequestering the proceeds of crime"
https://en.wikipedia.org/wiki/Sequestration_(law)

Ah, regarding restraint and its use in the UK in place of "freezing":

"A restraint order is an order which has the effect of freezing the assets and bank accounts of the persons against whom it is directed, in consequence of a belief by the authorities that some crime has been committed from which a person has benefited financially."
https://en.wikipedia.org/wiki/Restraint_order


So effectively you would have:

"ordering the freezing [restraint], seizure and sequestration of the shares of Company A in Company B, which were deposited with Authority X"

In relations to stocks
Dispose of, usually means selling (disposition)

Freeze is to prevent someone else from selling until certain conditions are met. There are other terms presented, but this is more specific to stocks.

Seize is what happens if the conditions of meeting the freeze are not met.


Frozen Account Definition - Investopedia
https://www.investopedia.com/terms/f/frozenaccount.asp
Sep 19, 2019 · Frozen accounts do not permit any debit transactions. When an account is frozen, account holders cannot make any withdrawals, purchases, or transfers,



What Does the Term Frozen Mean in the Stock Market ...
https://finance.zacks.com/term-frozen-mean-stock-market-1082...
Most of the time, the stock market is in constant motion. Millions of trades can go through in an hour, and millions of traders participate. When the market freezes, trading