The use of words depends on how it is developed, nothing much to do with the origin of the original language, in this case, from people who once lived in India, = Indoeuropean language. Word can have a common origin in their structure, but turn out to mean different things in different language due to development.
Examples.
House, originates from hut, from an old word with the meaning hide, to hide something.
дом, originates from a word with the original meaning, timber.
Boat, originates from bite, = split something in pieces, = the wood that is used building the boat.
сарай, (originates from защита - protection, Swedish Skydda) shed, barn, garage, = to guard something.
Gård, to guard something, with fences, stones, etc. to protect a small area.
Boat, Swedish Båt, Russian лодка, here is an example on where the B in the beginning of the word in russian have become a L, in Russian.
Here is an example on how it can shift over to a new letter in the beginning of a word.
Wood, Swedish Ved, Russian дерево, all from an origin word IE. widu, new word from that become divide (Latin) and is also reflected in the russian word derevo, D in the beginning due to influence from Latin.
The letter D, T, V, B, S, K, L, G, J. in the beginning of a word often shifts over time in different languages. This makes it possible to track language that is still more true to the original word, and the ones that have made changes later. The root in many word are often the same, placed in the middle of the word, but sometimes they could shift places, OE-EO, OA-AO. In some cases the whole word is turned in reverse.
Even if both Germanic and Slavic languages both are Indoeuropean languages, we can still talk about loanwords between them, and this has nothing to do with Adolf Hitler or being a russophobe. Take the word CITY as an example, it's root goes back on the same word for sit, in swedish sitta, and it connects to lie, as in lie down. The very small part in the middle of the word, "I" is here the root. The rest around "I" consonants builds up in creating the very nuance in the building of similar word, as in sit, lie, here some people could claim, that the word "city" is from old french going back from latin, but in fact, only the use of the word with exactly that meaning, as in what we now read and understand the word city, do that. So even if we had the same original word, common IE, in our language, we still must say that this is a loanword from old french.
This, you do not understand.
