trní
Trní is a Czech noun that denotes a thorn or prickle and is used to describe sharp, pointed projections on plants. In everyday language it appears when talking about rose thorns, blackberry canes, hawthorn, and other thorn-bearing vegetation. The word is also found in botanical contexts, where it designates a thorny outgrowth on a stem or branch.
In plant morphology thorns are typically modifications of stems, spines are usually modified leaves, and prickles
Thorns occur across diverse plant families and species. They are especially common in woody shrubs and trees
Culturally and linguistically, trní figures in descriptions of plant defense and in imagery associated with obstacles