צְמִיתֻתtsᵉmîythuth

completion, finality, = in perpetuity (Leviticus 25:23; Leviticus 25:30)

Pronunciation: tsem-ee-thooth' · Hebrew/Aramaic (Old Testament) · H6783

Same root

צָמַתtsâmath · H6789to extirpate (literally or figuratively)

Where it appears

Appears 2 times in the Bible.

Leviticus 25:23 “The land must never be sold on a permanent basis, for the land belongs to me. You are only foreigners and tenant farmers working for me.
Leviticus 25:30 But if it is not bought back within a year, the sale of the house within the walled town cannot be reversed. It will become the permanent property of the buyer. It will not be returned to the original owner in the Year of Jubilee.

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).