tupla (kaksinkertainen alkoholiannos, yl. 89 ml = 3 fl. oz)
kaksinkertaistaa, tuplata
“Sweden to double wind energy production in next four years (thelocal.se)”
kaksinkertaistua, tuplaantua
“Wind energy is set to double its share of Sweden's power supply over the next four years as a string of giant projects come online. (thelocal.se)”
kaksinkertainen, tupla-
“It was double the amount he had expected.”