To the southeast, Argentina. To the southwest, Paraguay.
Paraguay is southeast of Bolivia and northeast of Argentina. But Argentina also borders Bolivia directly to the north and there is a common meeting point of all three countries.
Argentina
It is Argentina.
Peru is bordered to the north by Ecuador and Columbia. It is bordered to the east by Brazil and Bolivia, and to the south by Chile.
Both Brazil and Chile border Argentina, Bolivia and Peru.
Yes, Chile is on Argentina's western border.
Peru is bordered by Ecuador, Colombia, Brazil, Bolivia, and Chile.
Argentina and Bolivia
The natural boundaries of Chile are Argentina to the east ,Bolivia and Peru to the north, Pacific Ocean to the west and south and Atlantic Ocean to the south.
Chile borders with Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far south.
From west to east, Bolvia is southern border is with Chile, Argentina, and Paraguay.
It borders Peru to the north, Bolivia to the northeast and Argentina to the east.
What countries border Bolivia to the north, east ,south, west? these is
Bolivia is bordered by Peru, Brazil, Chile, Argentina and Paraguay. In the related links box below I posted one with the map of South America so you can compare.