tinboeth

From tin (“arse, buttocks”) +‎ poeth (“hot, spicy”). The plant sense may be a partial calque of English arsesmart.

• (North Wales) IPA^(key): /ˈtɪnboɨ̯θ/
• (South Wales, standard, colloquial) IPA^(key): /ˈtɪnbɔi̯θ/
  • (South Wales, colloquial) IPA^(key): /ˈtɪnboːθ/

tinboeth (feminine singular tinboeth, plural tinboethion, equative mor dinboeth, comparative mwy tinboeth, superlative mwyaf tinboeth)

1. (vulgar) lecherous, lascivious, lustful (of women)

   Synonym: cynhaig

• This word is used of women, with anllad, chwantus or trythyll being more common for men.

• penboeth (“hot-headed”)

tinboeth f (plural tinboethion or tinboethiaid)

1. (with definite article) hydropiper, water pepper, arsesmart (Persicaria hydropiper)

   Synonyms: poethlys y dŵr, pengoch, llysiau'r din, gofid tin, y benboeth

   1. other smartweed species (Persicaria)

      Synonym: canwraidd

2. ragwort (Asteraceae spp., esp. Senecio and Jacobaea spp.)

   Synonym: llysiau'r gengroen

3. redstart (Phoenicurus spp.)

   Synonym: tingoch

4. bullfinch (Pyrrhula spp.)

   Synonym: coch y berllan

5. venereal disease

• D. G. Lewis, N. Lewis, editors (2005–present), “tinboeth”, in Gweiadur: the Welsh–English Dictionary, Gwerin
• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “tinboeth”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies