pindown
/ˈpɪndaʊn/noun
1 Military (originally US ). The action or fact of restricting the movement of troops, positions, etc., by means of air power or guided missile systems. Hence, of a soldier, military unit, etc.: inability to manoeuvre.
2 Wrestling. = pinfall.
3In the United Kingdom: a practice formerly carried out in certain children's homes whereby children were punished by being placed in solitary confinement; (a period of) such confinement.
Origin
1940s; earliest use found in Council Bluffs (Iowa) Nonpareil. From to pin down.