Dictionary / Vocabulary / 浮かせる
うかせる
to float; to save (on one's expenses)
一円玉を水に浮かせ、そこに磁石をゆっくり近づけると、一円玉は磁石に近づく。
If you float a one yen coin on water and move a magnet slowly towards it then the coin will approach the magnet.