出典:Wiktionary
1500s, English law, originally “to all intents, constructions, and purposes” (found in an act adopted under Henry VIII in 1547).
どのようなことがあっても
for the purpose of doing something―(はすたれかかった言い方、今は)―(in order) to do something―with the object of doing something―with the intention of doing something―with the idea of doing something―with the view of doing something―with a view to(doing) something―with an eye to something―(法律では)―with intent to do something
in spite of everything
provide for every eventuality
by every conceivable means