agujero
/aɡuˈxeɾo/ · A2 · noun · m
hole
🕳️🪡 agujero = aguja (needle) + -ero: first a needle-holder, then a needle-sized hole
From aguja (needle) plus the suffix -ero. It originally named a pincushion, the thing that holds needles, then shifted to the small opening a needle makes, and finally to any hole. A hole in the accounts is a debt.