H6796 — tsaniyn
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
tsaniyn — pronounced tsaw-neen
or tsanin {tsaw-neen'}; from the same as 6791; a thorn:--thorn. see H06791
2 occurrences in the KJV.
Numbers 33:55
But if ye will not drive out the inhabitants of the land from before you; then it shall come to pass, that those which ye let remain of them shall be pricks in your eyes, and thorns in your sides, and shall vex you in the land wherein ye dwell.
Joshua 23:13
Know for a certainty that the LORD your God will no more drive out any of these nations from before you; but they shall be snares and traps unto you, and scourges in your sides, and thorns in your eyes, until ye perish from off this good land which the LORD your God hath given you.