A letter of the Latin alphabet (capital: Þ, small: þ), borrowed by Old English from the futhark to represent a dental fricative, then not distinguished from eth, but in modern use (in Icelandic and other languages, but no longer in English) used only for the voiceless dental fricative found in English thigh
(1 ) Heb hedek (Prov 15: 19), rendered "brier" in Micah 7: 4 Some thorny plant, of the Solanum family, suitable for hedges This is probably the so-called "apple of Sodom," which grows very abundantly in the Jordan valley "It is a shrubby plant, from 3 to 5 feet high, with very branching stems, thickly clad with spines, like those of the English brier, with leaves very large and woolly on the under side, and thorny on the midriff "
If you describe someone or something as a thorn in your side or a thorn in your flesh, you mean that they are a continuous problem to you or annoy you. The Party was a thorn in the flesh of his coalition