H4668–מַפְתֵּחַ–maph.te.ach

And they stay till confounded, and lo, he is not opening the doors of the upper chamber, and they take the key, and open, and lo, their lord is fallen to the earth -- dead.

הַמַּפְתֵּ֙חַ֙ (מַּפְתֵּ֙חַ֙) maf.Te.ach “key”

and round about the house of God they lodge, for on them `is' the watch, and they `are' over the opening, even morning by morning.

הַמַּפְתֵּ֖חַ (מַּפְתֵּ֖חַ) maf.Te.ach “key”

And I have placed the key Of the house of David on his shoulder, And he hath opened, and none is shutting, And hath shut, and none is opening.

מַפְתֵּ֥חַ maf.Te.ach “[the] key of”