situation - when you are exchange one thing for another use for (used)
ofとはそのものに付随しているもののイメージ
Of---sounds like word belongs to something
＊The word for fish is_____.
＊The word used to say fish is_____.
＊The payment for gas is $1000/gal.
＊The scales of the fish.
＊The fins of the fish.
