The Spanish verb 'estacar' (meaning 'to stake') comes from the Spanish noun 'estaca' (meaning 'stake') combined with the verbal suffix '-ar'. The noun 'estaca' itself can be traced back to the Gothic word 'stakka', meaning 'pole' or 'stake'. This shows how the basic concept of a stake or pole has remained consistent from Gothic through to modern Spanish, with the verb form being created to describe the action of using a stake.

A simpler and more common related Spanish word is 'estaca' (stake, post). While 'estaca' refers to the physical object (a stake or post), the verb 'estacar' describes the action of using such a stake, typically for marking boundaries or tethering animals.

The English word 'stake' is actually related to 'estacar', as both ultimately derive from the same Germanic root. While the English 'stake' maintained its Germanic form, the Spanish word developed from Gothic 'stakka' and added a prosthetic 'e-' at the beginning (a common development in Spanish words beginning with 's' + consonant). You can see the connection between 'stake' and 'estaca/estacar' both in form and meaning.