Translation of "segellar" into English

Posa'm com un segell sobre el teu cor, com un segell sobre el teu braç, perquè l'amor és fort com la mort,

Set me as a seal upon thine heart, as a seal upon thine arm: for love is strong as death.

Vaig trigar una dècada a imaginar-me posar algo en un sobre i enganxar-hi un segell.

It took me over a decade to even imagine putting something in an envelope and licking a stamp.