krzew ciernisty in English:

Every rose has its thorn.

There's a thorn in my finger and I can't get it out.

you're a thorn in my side

a very short, hard, leafless branch or stem with a sharp point. Be careful - that plant has sharp thorns.

A thorn is a sharp structure on plants, e.g. on a rose.

There's this elephant and he steps on this thorn.

In Norwegian, Swedish and Danish, holly is known as "Christ's thorns", the legend being that Christ wore a crown of holly thorns before his death.

tulip dosen't have thorns

Like a thorn stuck in your throat.