en_tn_condensed/exo/31/14.md

for it must be treated by you as holy

"for you must treat it as holy"

Everyone who defiles it

"Everyone who treats the Sabbath with disrespect" or "Everyone who does not obey the laws about the Sabbath"

must surely be put to death

"you must surely kill" or "you must surely execute"

must surely be cut off from his people

Possible meanings: 1) "Yahweh will no longer consider him to be one of his people" 2) "you must surely send him away" or 3) "you must surely kill him."