Arsesmart

//ˈɑːsmɑːt// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A water pepper plant, of species Persicaria hydropiper (formerly Polygonum hydropiper). uncountable

Etymology

From arse + smart, because the plant stings when it touches bare skin, and was often laid in beds to kill fleas.

Related phrases

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.