שָׁמִיר (šāmîr) is
a Hebrew noun
meaning thorn. It appears
11 times
in 4 books of the Hebrew Bible
(Strong's H8068).
Same Hebrew root (TWOT 2416a)
Range of meaning (TWOT 2416a)thorn, adamant, flint; keenness, diamond; brier
Full entry: Brown-Driver-Briggs and Strong's
שָׁמִירnoun, masculine: thorn, adamant, flint
Strong's H8068שָׁמִיר: a thorn; also (from its keenness for scratching) a gem, probably the diamond KJV:adamant (stone), brier, diamond.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.