The Finnish term "sulku, lukko, lukita" matches the English term "lock"

other finnish words that include "sulku" : english :
sulku sluice
other finnish words that include "lukko" : english :
taulukko index
taulukko, pöytä table
taulukko tablet
taulukko tabulation
other finnish words that include "lukita" : english :
lukita bolt
kiinnittää, lukita fasten