A diacritical mark ( ´ ) that can be placed above a number of letters in many languages of the Latin, Greek and Cyrillic writing systems.
A letter of Latin script (capital: Þ, small: þ), borrowed from the futhark; today used only in Icelandic to represent the voiceless dental fricative, but originally used in several early Germanic scripts, including Old English where it represented the dental fricatives that are today written th (Old English did not have phonemic voicing distinctions for fricatives).
That which pricks or annoys; anything troublesome.
A sharp protective spine of a plant.
Any shrub or small tree that bears thorns, especially a hawthorn.
To pierce with, or as if with, a thorn (sharp pointed object).