The Swedish term "torn, tagg, törne" matches the English term "thorn"

other swedish words that include "tagg" : english :
taggtråd barbed wire
gnetägg nit
sticka, tagg prickle
taggig prickly
bult, pigg, tagg spike
other swedish words that include "törne" : english :
gultörne gorse
tornera joust
ryggrad, törne spine